1157287689 has 16 divisors (see below), whose sum is σ = 1756319040. Its totient is φ = 752706720.

The previous prime is 1157287673. The next prime is 1157287723. The reversal of 1157287689 is 9867827511.

1157287689 is a `hidden beast` number, since 1 + 1 + 572 + 8 + 7 + 68 + 9 = 666.

It is not a de Polignac number, because 1157287689 - 2⁴ = 1157287673 is a prime.

It is a super-2 number, since 2×1157287689² = 2678629590221921442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1157287639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 521607 + ... + 523820.

It is an arithmetic number, because the mean of its divisors is an integer number (109769940).

Almost surely, 2^1157287689 is an apocalyptic number.

It is an amenable number.

1157287689 is a deficient number, since it is larger than the sum of its proper divisors (599031351).

1157287689 is a wasteful number, since it uses less digits than its factorization.

1157287689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045477 (or 1045471 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The square root of 1157287689 is about 34018.9313324214. The cubic root of 1157287689 is about 1049.8980064195.

The spelling of 1157287689 in words is "one billion, one hundred fifty-seven million, two hundred eighty-seven thousand, six hundred eighty-nine".