72404669 has 2 divisors, whose sum is σ = 72404670. Its totient is φ = 72404668.

The previous prime is 72404659. The next prime is 72404699. The reversal of 72404669 is 96640427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69939769 + 2464900 = 8363^2 + 1570^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72404669 is a prime.

It is a super-2 number, since 2×72404669² = 10484872185999122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72404659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36202334 + 36202335.

It is an arithmetic number, because the mean of its divisors is an integer number (36202335).

Almost surely, 2^72404669 is an apocalyptic number.

It is an amenable number.

72404669 is a deficient number, since it is larger than the sum of its proper divisors (1).

72404669 is an equidigital number, since it uses as much as digits as its factorization.

72404669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 72404669 is about 8509.0933124511. The cubic root of 72404669 is about 416.7947029099.

The spelling of 72404669 in words is "seventy-two million, four hundred four thousand, six hundred sixty-nine".