158197807 has 2 divisors, whose sum is σ = 158197808. Its totient is φ = 158197806.

The previous prime is 158197799. The next prime is 158197843. The reversal of 158197807 is 708791851.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 158197807 - 2³ = 158197799 is a prime.

It is a super-2 number, since 2×158197807² = 50053092279218498, which contains 22 as substring.

It is equal to p_8879059 and since 158197807 and 8879059 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158197877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79098903 + 79098904.

It is an arithmetic number, because the mean of its divisors is an integer number (79098904).

Almost surely, 2^158197807 is an apocalyptic number.

158197807 is a deficient number, since it is larger than the sum of its proper divisors (1).

158197807 is an equidigital number, since it uses as much as digits as its factorization.

158197807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141120, while the sum is 46.

The square root of 158197807 is about 12577.6709688241. The cubic root of 158197807 is about 540.8375286427.

The spelling of 158197807 in words is "one hundred fifty-eight million, one hundred ninety-seven thousand, eight hundred seven".