72620605 has 4 divisors (see below), whose sum is σ = 87144732. Its totient is φ = 58096480.

The previous prime is 72620599. The next prime is 72620609. The reversal of 72620605 is 50602627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 57790404 + 14830201 = 7602^2 + 3851^2 .

It is not a de Polignac number, because 72620605 - 2⁵ = 72620573 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 (72620609) 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, 7262056 + ... + 7262065.

It is an arithmetic number, because the mean of its divisors is an integer number (21786183).

Almost surely, 2^72620605 is an apocalyptic number.

It is an amenable number.

72620605 is a deficient number, since it is larger than the sum of its proper divisors (14524127).

72620605 is a wasteful number, since it uses less digits than its factorization.

72620605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14524126.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 72620605 is about 8521.7724095402. The cubic root of 72620605 is about 417.2086341232.

The spelling of 72620605 in words is "seventy-two million, six hundred twenty thousand, six hundred five".