1153897065 has 12 divisors (see below), whose sum is σ = 2000088324. Its totient is φ = 615411744.

The previous prime is 1153897033. The next prime is 1153897093. The reversal of 1153897065 is 5607983511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 166177881 + 987719184 = 12891^2 + 31428^2 .

It is not a de Polignac number, because 1153897065 - 2⁵ = 1153897033 is a prime.

It is a super-2 number, since 2×1153897065² = 2662956873231228450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 25642157 = 1153897065 / (1 + 1 + 5 + 3 + 8 + 9 + 7 + 0 + 6 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1153897065.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12821034 + ... + 12821123.

It is an arithmetic number, because the mean of its divisors is an integer number (166674027).

Almost surely, 2^1153897065 is an apocalyptic number.

1153897065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1153897065 is a deficient number, since it is larger than the sum of its proper divisors (846191259).

1153897065 is a wasteful number, since it uses less digits than its factorization.

1153897065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25642168 (or 25642165 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The square root of 1153897065 is about 33969.0604079654. The cubic root of 1153897065 is about 1048.8716722896.

The spelling of 1153897065 in words is "one billion, one hundred fifty-three million, eight hundred ninety-seven thousand, sixty-five".