1157899197 has 96 divisors (see below), whose sum is σ = 2075566080. Its totient is φ = 558472320.

The previous prime is 1157899187. The next prime is 1157899199. The reversal of 1157899197 is 7919987511.

It is not a de Polignac number, because 1157899197 - 2¹⁶ = 1157833661 is a prime.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157899199) 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 in 95 ways as a sum of consecutive naturals, for example, 3054954 + ... + 3055332.

It is an arithmetic number, because the mean of its divisors is an integer number (21620480).

Almost surely, 2^1157899197 is an apocalyptic number.

It is an amenable number.

1157899197 is a deficient number, since it is larger than the sum of its proper divisors (917666883).

1157899197 is a wasteful number, since it uses less digits than its factorization.

1157899197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 471 (or 452 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 57.

The square root of 1157899197 is about 34027.9179057432. The cubic root of 1157899197 is about 1050.0828950428.

The spelling of 1157899197 in words is "one billion, one hundred fifty-seven million, eight hundred ninety-nine thousand, one hundred ninety-seven".