156083993 has 16 divisors (see below), whose sum is σ = 180290880. Its totient is φ = 133907904.

The previous prime is 156083989. The next prime is 156084041. The reversal of 156083993 is 399380651.

156083993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156083993 - 2² = 156083989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156083093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7130 + ... + 19052.

It is an arithmetic number, because the mean of its divisors is an integer number (11268180).

Almost surely, 2^156083993 is an apocalyptic number.

156083993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

156083993 is a deficient number, since it is larger than the sum of its proper divisors (24206887).

156083993 is a wasteful number, since it uses less digits than its factorization.

156083993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12008.

The product of its (nonzero) digits is 174960, while the sum is 44.

The square root of 156083993 is about 12493.3579553297. The cubic root of 156083993 is about 538.4178575875.

The spelling of 156083993 in words is "one hundred fifty-six million, eighty-three thousand, nine hundred ninety-three".