157312989 has 16 divisors (see below), whose sum is σ = 245323200. Its totient is φ = 99355248.

The previous prime is 157312973. The next prime is 157313021. The reversal of 157312989 is 989213751.

It is not a de Polignac number, because 157312989 - 2⁴ = 157312973 is a prime.

It is a super-2 number, since 2×157312989² = 49494753016228242, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157312289) 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, 152814 + ... + 153839.

It is an arithmetic number, because the mean of its divisors is an integer number (15332700).

Almost surely, 2^157312989 is an apocalyptic number.

157312989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

157312989 is a deficient number, since it is larger than the sum of its proper divisors (88010211).

157312989 is a wasteful number, since it uses less digits than its factorization.

157312989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306681 (or 306675 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 157312989 is about 12542.4474884290. The cubic root of 157312989 is about 539.8273213307.

The spelling of 157312989 in words is "one hundred fifty-seven million, three hundred twelve thousand, nine hundred eighty-nine".