157989387 has 8 divisors (see below), whose sum is σ = 210710736. Its totient is φ = 105297152.

The previous prime is 157989383. The next prime is 157989401. The reversal of 157989387 is 783989751.

157989387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 157989387 - 2² = 157989383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (157989383) 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, 16303 + ... + 24119.

It is an arithmetic number, because the mean of its divisors is an integer number (26338842).

Almost surely, 2^157989387 is an apocalyptic number.

157989387 is a deficient number, since it is larger than the sum of its proper divisors (52721349).

157989387 is an equidigital number, since it uses as much as digits as its factorization.

157989387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14557.

The product of its digits is 3810240, while the sum is 57.

The square root of 157989387 is about 12569.3829204142. The cubic root of 157989387 is about 540.5999128412.

The spelling of 157989387 in words is "one hundred fifty-seven million, nine hundred eighty-nine thousand, three hundred eighty-seven".