1157235769 has 2 divisors, whose sum is σ = 1157235770. Its totient is φ = 1157235768.

The previous prime is 1157235757. The next prime is 1157235773. The reversal of 1157235769 is 9675327511.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 651525625 + 505710144 = 25525^2 + 22488^2 .

It is a cyclic number.

It is not a de Polignac number, because 1157235769 - 2⁹ = 1157235257 is a prime.

It is a super-2 number, since 2×1157235769² = 2678389250106042722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1157235719) 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 as a sum of consecutive naturals, namely, 578617884 + 578617885.

It is an arithmetic number, because the mean of its divisors is an integer number (578617885).

Almost surely, 2^1157235769 is an apocalyptic number.

It is an amenable number.

1157235769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157235769 is an equidigital number, since it uses as much as digits as its factorization.

1157235769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 396900, while the sum is 46.

The square root of 1157235769 is about 34018.1682193501. The cubic root of 1157235769 is about 1049.8823054778.

The spelling of 1157235769 in words is "one billion, one hundred fifty-seven million, two hundred thirty-five thousand, seven hundred sixty-nine".