72539961 has 8 divisors (see below), whose sum is σ = 104160000. Its totient is φ = 44639952.

The previous prime is 72539959. The next prime is 72539963. The reversal of 72539961 is 16993527.

It is an interprime number because it is at equal distance from previous prime (72539959) and next prime (72539963).

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

It is not a de Polignac number, because 72539961 - 2¹ = 72539959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72539963) 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, 929961 + ... + 930038.

It is an arithmetic number, because the mean of its divisors is an integer number (13020000).

Almost surely, 2^72539961 is an apocalyptic number.

It is an amenable number.

72539961 is a deficient number, since it is larger than the sum of its proper divisors (31620039).

72539961 is a wasteful number, since it uses less digits than its factorization.

72539961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1860015.

The product of its digits is 102060, while the sum is 42.

The square root of 72539961 is about 8517.0394504194. The cubic root of 72539961 is about 417.0541424561.

The spelling of 72539961 in words is "seventy-two million, five hundred thirty-nine thousand, nine hundred sixty-one".