1157992993 has 2 divisors, whose sum is σ = 1157992994. Its totient is φ = 1157992992.

The previous prime is 1157992949. The next prime is 1157992999. The reversal of 1157992993 is 3992997511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1157904784 + 88209 = 34028^2 + 297^2 .

It is an emirp because it is prime and its reverse (3992997511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1157992993 - 2⁹ = 1157992481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157992999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578996496 + 578996497.

It is an arithmetic number, because the mean of its divisors is an integer number (578996497).

Almost surely, 2^1157992993 is an apocalyptic number.

It is an amenable number.

1157992993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157992993 is an equidigital number, since it uses as much as digits as its factorization.

1157992993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1377810, while the sum is 55.

The square root of 1157992993 is about 34029.2960990967. The cubic root of 1157992993 is about 1050.1112483790. Note that the first 3 decimals are identical.

The spelling of 1157992993 in words is "one billion, one hundred fifty-seven million, nine hundred ninety-two thousand, nine hundred ninety-three".