72948981 has 16 divisors (see below), whose sum is σ = 111383168. Its totient is φ = 41601600.

The previous prime is 72948979. The next prime is 72949001. The reversal of 72948981 is 18984927.

It is not a de Polignac number, because 72948981 - 2¹ = 72948979 is a prime.

It is a super-2 number, since 2×72948981² = 10643107657876722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 72948981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72948901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8151 + ... + 14571.

It is an arithmetic number, because the mean of its divisors is an integer number (6961448).

Almost surely, 2^72948981 is an apocalyptic number.

It is an amenable number.

72948981 is a deficient number, since it is larger than the sum of its proper divisors (38434187).

72948981 is a wasteful number, since it uses less digits than its factorization.

72948981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6972.

The product of its digits is 290304, while the sum is 48.

The square root of 72948981 is about 8541.0175623283. The cubic root of 72948981 is about 417.8365336109.

The spelling of 72948981 in words is "seventy-two million, nine hundred forty-eight thousand, nine hundred eighty-one".