72039951 has 12 divisors (see below), whose sum is σ = 105069328. Its totient is φ = 47559744.

The previous prime is 72039949. The next prime is 72039971. The reversal of 72039951 is 15993027.

It is not a de Polignac number, because 72039951 - 2¹ = 72039949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72039901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37930 + ... + 39783.

Almost surely, 2^72039951 is an apocalyptic number.

72039951 is a deficient number, since it is larger than the sum of its proper divisors (33029377).

72039951 is a wasteful number, since it uses less digits than its factorization.

72039951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77822 (or 77819 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 72039951 is about 8487.6351830177. The cubic root of 72039951 is about 416.0936961504.

The spelling of 72039951 in words is "seventy-two million, thirty-nine thousand, nine hundred fifty-one".