1165457797 has 12 divisors (see below), whose sum is σ = 1435486860. Its totient is φ = 940200576.

The previous prime is 1165457749. The next prime is 1165457801. The reversal of 1165457797 is 7977545611.

It can be written as a sum of positive squares in 2 ways, for example, as 783216196 + 382241601 = 27986^2 + 19551^2 .

It is not a de Polignac number, because 1165457797 - 2¹¹ = 1165455749 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1165457747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 698722 + ... + 700387.

It is an arithmetic number, because the mean of its divisors is an integer number (119623905).

Almost surely, 2^1165457797 is an apocalyptic number.

1165457797 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1165457797 is a deficient number, since it is larger than the sum of its proper divisors (270029063).

1165457797 is a wasteful number, since it uses less digits than its factorization.

1165457797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1399140 (or 1399133 counting only the distinct ones).

The product of its digits is 1852200, while the sum is 52.

The square root of 1165457797 is about 34138.8019268398. The cubic root of 1165457797 is about 1052.3628713080.

The spelling of 1165457797 in words is "one billion, one hundred sixty-five million, four hundred fifty-seven thousand, seven hundred ninety-seven".