157990867 has 2 divisors, whose sum is σ = 157990868. Its totient is φ = 157990866.

The previous prime is 157990853. The next prime is 157990873. The reversal of 157990867 is 768099751.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157990867 - 2²³ = 149602259 is a prime.

It is a super-2 number, since 2×157990867² = 49922228110823378, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (157990897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78995433 + 78995434.

It is an arithmetic number, because the mean of its divisors is an integer number (78995434).

Almost surely, 2^157990867 is an apocalyptic number.

157990867 is a deficient number, since it is larger than the sum of its proper divisors (1).

157990867 is an equidigital number, since it uses as much as digits as its factorization.

157990867 is an evil number, because the sum of its binary digits is even.

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

The square root of 157990867 is about 12569.4417934927. The cubic root of 157990867 is about 540.6016008985.

The spelling of 157990867 in words is "one hundred fifty-seven million, nine hundred ninety thousand, eight hundred sixty-seven".