72999839 has 8 divisors (see below), whose sum is σ = 79805568. Its totient is φ = 66222360.

The previous prime is 72999833. The next prime is 72999841. The reversal of 72999839 is 93899927.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72999839 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 (72999833) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1457 + ... + 12170.

It is an arithmetic number, because the mean of its divisors is an integer number (9975696).

Almost surely, 2^72999839 is an apocalyptic number.

72999839 is a deficient number, since it is larger than the sum of its proper divisors (6805729).

72999839 is a wasteful number, since it uses less digits than its factorization.

72999839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14125.

The product of its digits is 2204496, while the sum is 56.

The square root of 72999839 is about 8543.9943235000. The cubic root of 72999839 is about 417.9336123897.

It can be divided in two parts, 729998 and 39, that added together give a palindrome (730037).

The spelling of 72999839 in words is "seventy-two million, nine hundred ninety-nine thousand, eight hundred thirty-nine".