156838001 has 2 divisors, whose sum is σ = 156838002. Its totient is φ = 156838000.

The previous prime is 156837991. The next prime is 156838007. The reversal of 156838001 is 100838651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139830625 + 17007376 = 11825^2 + 4124^2 .

It is a cyclic number.

It is not a de Polignac number, because 156838001 - 2²⁶ = 89729137 is a prime.

It is equal to p_8807090 and since 156838001 and 8807090 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (156838007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78419000 + 78419001.

It is an arithmetic number, because the mean of its divisors is an integer number (78419001).

Almost surely, 2^156838001 is an apocalyptic number.

It is an amenable number.

156838001 is a deficient number, since it is larger than the sum of its proper divisors (1).

156838001 is an equidigital number, since it uses as much as digits as its factorization.

156838001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 156838001 is about 12523.4979538466. The cubic root of 156838001 is about 539.2834586292.

The spelling of 156838001 in words is "one hundred fifty-six million, eight hundred thirty-eight thousand, one".