1157899187 has 2 divisors, whose sum is σ = 1157899188. Its totient is φ = 1157899186.

The previous prime is 1157899157. The next prime is 1157899199. The reversal of 1157899187 is 7819987511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1157899187 - 2⁶ = 1157899123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1157899147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578949593 + 578949594.

It is an arithmetic number, because the mean of its divisors is an integer number (578949594).

Almost surely, 2^1157899187 is an apocalyptic number.

1157899187 is a deficient number, since it is larger than the sum of its proper divisors (1).

1157899187 is an equidigital number, since it uses as much as digits as its factorization.

1157899187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 56.

The square root of 1157899187 is about 34027.9177588050. The cubic root of 1157899187 is about 1050.0828920198.

The spelling of 1157899187 in words is "one billion, one hundred fifty-seven million, eight hundred ninety-nine thousand, one hundred eighty-seven".