1157393951 has 4 divisors (see below), whose sum is σ = 1322735952. Its totient is φ = 992051952.

The previous prime is 1157393927. The next prime is 1157393957. The reversal of 1157393951 is 1593937511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1593937511 = 311 ⋅5125201.

It is a cyclic number.

It is not a de Polignac number, because 1157393951 - 2²² = 1153199647 is a prime.

It is a super-2 number, since 2×1157393951² = 2679121515622780802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157393957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82670990 + ... + 82671003.

It is an arithmetic number, because the mean of its divisors is an integer number (330683988).

Almost surely, 2^1157393951 is an apocalyptic number.

1157393951 is a deficient number, since it is larger than the sum of its proper divisors (165342001).

1157393951 is an equidigital number, since it uses as much as digits as its factorization.

1157393951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165342000.

The product of its digits is 127575, while the sum is 44.

The square root of 1157393951 is about 34020.4931034222. The cubic root of 1157393951 is about 1049.9301392673.

The spelling of 1157393951 in words is "one billion, one hundred fifty-seven million, three hundred ninety-three thousand, nine hundred fifty-one".