157609987 has 2 divisors, whose sum is σ = 157609988. Its totient is φ = 157609986.

The previous prime is 157609979. The next prime is 157610003. The reversal of 157609987 is 789906751.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 157609987 - 2³ = 157609979 is a prime.

It is not a weakly prime, because it can be changed into another prime (157609957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78804993 + 78804994.

It is an arithmetic number, because the mean of its divisors is an integer number (78804994).

Almost surely, 2^157609987 is an apocalyptic number.

157609987 is a deficient number, since it is larger than the sum of its proper divisors (1).

157609987 is an equidigital number, since it uses as much as digits as its factorization.

157609987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 952560, while the sum is 52.

The square root of 157609987 is about 12554.2816202282. The cubic root of 157609987 is about 540.1668288840.

The spelling of 157609987 in words is "one hundred fifty-seven million, six hundred nine thousand, nine hundred eighty-seven".