1148553809 has 8 divisors (see below), whose sum is σ = 1247851752. Its totient is φ = 1050819840.

The previous prime is 1148553797. The next prime is 1148553827. The reversal of 1148553809 is 9083558411.

It can be written as a sum of positive squares in 4 ways, for example, as 238023184 + 910530625 = 15428^2 + 30175^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1148553809 - 2⁴ = 1148553793 is a prime.

It is a super-3 number, since 3×1148553809³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1148553809.

It is not an unprimeable number, because it can be changed into a prime (1148553859) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 389462 + ... + 392399.

It is an arithmetic number, because the mean of its divisors is an integer number (155981469).

Almost surely, 2^1148553809 is an apocalyptic number.

It is an amenable number.

1148553809 is a deficient number, since it is larger than the sum of its proper divisors (99297943).

1148553809 is a wasteful number, since it uses less digits than its factorization.

1148553809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 781987.

The product of its (nonzero) digits is 172800, while the sum is 44.

The square root of 1148553809 is about 33890.3202847067. The cubic root of 1148553809 is about 1047.2501923659.

The spelling of 1148553809 in words is "one billion, one hundred forty-eight million, five hundred fifty-three thousand, eight hundred nine".