72493919 has 2 divisors, whose sum is σ = 72493920. Its totient is φ = 72493918.

The previous prime is 72493901. The next prime is 72493951. The reversal of 72493919 is 91939427.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72493919 is a prime.

It is a super-2 number, since 2×72493919² = 10510736583957122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72493919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72493969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36246959 + 36246960.

It is an arithmetic number, because the mean of its divisors is an integer number (36246960).

Almost surely, 2^72493919 is an apocalyptic number.

72493919 is a deficient number, since it is larger than the sum of its proper divisors (1).

72493919 is an equidigital number, since it uses as much as digits as its factorization.

72493919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 72493919 is about 8514.3360868596. The cubic root of 72493919 is about 416.9658873271.

The spelling of 72493919 in words is "seventy-two million, four hundred ninety-three thousand, nine hundred nineteen".