1157099287 has 4 divisors (see below), whose sum is σ = 1157373360. Its totient is φ = 1156825216.

The previous prime is 1157099239. The next prime is 1157099291. The reversal of 1157099287 is 7829907511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1157099287 - 2²³ = 1148710679 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1157099287.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1157099887) 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, 130603 + ... + 139180.

It is an arithmetic number, because the mean of its divisors is an integer number (289343340).

Almost surely, 2^1157099287 is an apocalyptic number.

1157099287 is a deficient number, since it is larger than the sum of its proper divisors (274073).

1157099287 is an equidigital number, since it uses as much as digits as its factorization.

1157099287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274072.

The product of its (nonzero) digits is 317520, while the sum is 49.

The square root of 1157099287 is about 34016.1621438986. The cubic root of 1157099287 is about 1049.8410302038.

The spelling of 1157099287 in words is "one billion, one hundred fifty-seven million, ninety-nine thousand, two hundred eighty-seven".