72409319 has 2 divisors, whose sum is σ = 72409320. Its totient is φ = 72409318.

The previous prime is 72409297. The next prime is 72409339. The reversal of 72409319 is 91390427.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72409319 is a prime.

It is a super-2 number, since 2×72409319² = 10486218956087522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72409339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36204659 + 36204660.

It is an arithmetic number, because the mean of its divisors is an integer number (36204660).

Almost surely, 2^72409319 is an apocalyptic number.

72409319 is a deficient number, since it is larger than the sum of its proper divisors (1).

72409319 is an equidigital number, since it uses as much as digits as its factorization.

72409319 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 72409319 is about 8509.3665451666. The cubic root of 72409319 is about 416.8036252345.

The spelling of 72409319 in words is "seventy-two million, four hundred nine thousand, three hundred nineteen".