157980989 has 8 divisors (see below), whose sum is σ = 158945280. Its totient is φ = 157020336.

The previous prime is 157980973. The next prime is 157981001. The reversal of 157980989 is 989089751.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157980989 - 2⁴ = 157980973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157980919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151532 + ... + 152570.

It is an arithmetic number, because the mean of its divisors is an integer number (19868160).

Almost surely, 2^157980989 is an apocalyptic number.

It is an amenable number.

157980989 is a deficient number, since it is larger than the sum of its proper divisors (964291).

157980989 is a wasteful number, since it uses less digits than its factorization.

157980989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1819.

The product of its (nonzero) digits is 1632960, while the sum is 56.

The square root of 157980989 is about 12569.0488502512. The cubic root of 157980989 is about 540.5903340575.

The spelling of 157980989 in words is "one hundred fifty-seven million, nine hundred eighty thousand, nine hundred eighty-nine".