72626317 has 4 divisors (see below), whose sum is σ = 72690460. Its totient is φ = 72562176.

The previous prime is 72626311. The next prime is 72626321. The reversal of 72626317 is 71362627.

It is a happy number.

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 26739241 + 45887076 = 5171^2 + 6774^2 .

It is a cyclic number.

It is not a de Polignac number, because 72626317 - 2²³ = 64237709 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 (72626311) 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, 30342 + ... + 32647.

It is an arithmetic number, because the mean of its divisors is an integer number (18172615).

Almost surely, 2^72626317 is an apocalyptic number.

It is an amenable number.

72626317 is a deficient number, since it is larger than the sum of its proper divisors (64143).

72626317 is a wasteful number, since it uses less digits than its factorization.

72626317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64142.

The product of its digits is 21168, while the sum is 34.

The square root of 72626317 is about 8522.1075444986. The cubic root of 72626317 is about 417.2195724018.

The spelling of 72626317 in words is "seventy-two million, six hundred twenty-six thousand, three hundred seventeen".