72463904969 has 2 divisors, whose sum is σ = 72463904970. Its totient is φ = 72463904968.

The previous prime is 72463904959. The next prime is 72463904971. The reversal of 72463904969 is 96940936427.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64929664969 + 7534240000 = 254813^2 + 86800^2 .

It is an emirp because it is prime and its reverse (96940936427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72463904969 - 2⁸ = 72463904713 is a prime.

It is a super-2 number, since 2×72463904969² (a number of 23 digits) contains 22 as substring.

Together with 72463904971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72463904939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36231952484 + 36231952485.

It is an arithmetic number, because the mean of its divisors is an integer number (36231952485).

Almost surely, 2^72463904969 is an apocalyptic number.

It is an amenable number.

72463904969 is a deficient number, since it is larger than the sum of its proper divisors (1).

72463904969 is an equidigital number, since it uses as much as digits as its factorization.

72463904969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 59.

The spelling of 72463904969 in words is "seventy-two billion, four hundred sixty-three million, nine hundred four thousand, nine hundred sixty-nine".