72959939 has 4 divisors (see below), whose sum is σ = 78572256. Its totient is φ = 67347624.

The previous prime is 72959921. The next prime is 72959963. The reversal of 72959939 is 93995927.

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

It is a cyclic number.

It is not a de Polignac number, because 72959939 - 2¹² = 72955843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72959039) 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, 2806139 + ... + 2806164.

It is an arithmetic number, because the mean of its divisors is an integer number (19643064).

Almost surely, 2^72959939 is an apocalyptic number.

72959939 is a deficient number, since it is larger than the sum of its proper divisors (5612317).

72959939 is a wasteful number, since it uses less digits than its factorization.

72959939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612316.

The product of its digits is 1377810, while the sum is 53.

The square root of 72959939 is about 8541.6590308909. The cubic root of 72959939 is about 417.8574542755.

The spelling of 72959939 in words is "seventy-two million, nine hundred fifty-nine thousand, nine hundred thirty-nine".