72472689 has 6 divisors (see below), whose sum is σ = 104682786. Its totient is φ = 48315120.

The previous prime is 72472681. The next prime is 72472691. The reversal of 72472689 is 98627427.

It can be written as a sum of positive squares in only one way, i.e., 70560000 + 1912689 = 8400^2 + 1383^2 .

It is not a de Polignac number, because 72472689 - 2³ = 72472681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72472681) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4026252 + ... + 4026269.

It is an arithmetic number, because the mean of its divisors is an integer number (17447131).

Almost surely, 2^72472689 is an apocalyptic number.

It is an amenable number.

72472689 is a deficient number, since it is larger than the sum of its proper divisors (32210097).

72472689 is a wasteful number, since it uses less digits than its factorization.

72472689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8052527 (or 8052524 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 72472689 is about 8513.0892747580. The cubic root of 72472689 is about 416.9251802344.

The spelling of 72472689 in words is "seventy-two million, four hundred seventy-two thousand, six hundred eighty-nine".