157391887 has 2 divisors, whose sum is σ = 157391888. Its totient is φ = 157391886.

The previous prime is 157391873. The next prime is 157391917. The reversal of 157391887 is 788193751.

It is a weak prime.

It is an emirp because it is prime and its reverse (788193751) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 157391887 - 2²⁷ = 23174159 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157391887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157391827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78695943 + 78695944.

It is an arithmetic number, because the mean of its divisors is an integer number (78695944).

Almost surely, 2^157391887 is an apocalyptic number.

157391887 is a deficient number, since it is larger than the sum of its proper divisors (1).

157391887 is an equidigital number, since it uses as much as digits as its factorization.

157391887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 49.

The square root of 157391887 is about 12545.5923335648. The cubic root of 157391887 is about 539.9175537137.

The spelling of 157391887 in words is "one hundred fifty-seven million, three hundred ninety-one thousand, eight hundred eighty-seven".