156328901 has 4 divisors (see below), whose sum is σ = 156403404. Its totient is φ = 156254400.

The previous prime is 156328891. The next prime is 156328933. The reversal of 156328901 is 109823651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120340900 + 35988001 = 10970^2 + 5999^2 .

It is a cyclic number.

It is not a de Polignac number, because 156328901 - 2¹⁴ = 156312517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (156328961) 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 in 3 ways as a sum of consecutive naturals, for example, 34010 + ... + 38331.

It is an arithmetic number, because the mean of its divisors is an integer number (39100851).

Almost surely, 2^156328901 is an apocalyptic number.

It is an amenable number.

156328901 is a deficient number, since it is larger than the sum of its proper divisors (74503).

156328901 is an equidigital number, since it uses as much as digits as its factorization.

156328901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74502.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 156328901 is about 12503.1556416770. The cubic root of 156328901 is about 538.6993170130.

The spelling of 156328901 in words is "one hundred fifty-six million, three hundred twenty-eight thousand, nine hundred one".