72632409 has 4 divisors (see below), whose sum is σ = 96843216. Its totient is φ = 48421604.

The previous prime is 72632401. The next prime is 72632423. The reversal of 72632409 is 90423627.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72632409 - 2³ = 72632401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72632409.

It is not an unprimeable number, because it can be changed into a prime (72632401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12105399 + ... + 12105404.

It is an arithmetic number, because the mean of its divisors is an integer number (24210804).

Almost surely, 2^72632409 is an apocalyptic number.

It is an amenable number.

72632409 is a deficient number, since it is larger than the sum of its proper divisors (24210807).

72632409 is a wasteful number, since it uses less digits than its factorization.

72632409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24210806.

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 72632409 is about 8522.4649603269. The cubic root of 72632409 is about 417.2312377351.

The spelling of 72632409 in words is "seventy-two million, six hundred thirty-two thousand, four hundred nine".