72103239 has 24 divisors (see below), whose sum is σ = 118761552. Its totient is φ = 41760000.

The previous prime is 72103231. The next prime is 72103243. The reversal of 72103239 is 93230127.

It is not a de Polignac number, because 72103239 - 2³ = 72103231 is a prime.

It is a super-2 number, since 2×72103239² = 10397754148582242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72103231) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16137 + ... + 20114.

It is an arithmetic number, because the mean of its divisors is an integer number (4948398).

Almost surely, 2^72103239 is an apocalyptic number.

72103239 is a deficient number, since it is larger than the sum of its proper divisors (46658313).

72103239 is a wasteful number, since it uses less digits than its factorization.

72103239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36287 (or 36284 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 72103239 is about 8491.3626115012. The cubic root of 72103239 is about 416.2155083289.

The spelling of 72103239 in words is "seventy-two million, one hundred three thousand, two hundred thirty-nine".