1157392309 has 2 divisors, whose sum is σ = 1157392310. Its totient is φ = 1157392308.

The previous prime is 1157392279. The next prime is 1157392319. The reversal of 1157392309 is 9032937511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1109089809 + 48302500 = 33303^2 + 6950^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157392309 - 2⁹ = 1157391797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1157392319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578696154 + 578696155.

It is an arithmetic number, because the mean of its divisors is an integer number (578696155).

Almost surely, 2^1157392309 is an apocalyptic number.

It is an amenable number.

1157392309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157392309 is an equidigital number, since it uses as much as digits as its factorization.

1157392309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 1157392309 is about 34020.4689709004. The cubic root of 1157392309 is about 1049.9296427536.

The spelling of 1157392309 in words is "one billion, one hundred fifty-seven million, three hundred ninety-two thousand, three hundred nine".