72313919 has 2 divisors, whose sum is σ = 72313920. Its totient is φ = 72313918.

The previous prime is 72313861. The next prime is 72313921. The reversal of 72313919 is 91931327.

It is a strong prime.

It is an emirp because it is prime and its reverse (91931327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72313919 - 2²⁴ = 55536703 is a prime.

It is a super-2 number, since 2×72313919² = 10458605762277122, which contains 22 as substring.

Together with 72313921, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72313949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36156959 + 36156960.

It is an arithmetic number, because the mean of its divisors is an integer number (36156960).

Almost surely, 2^72313919 is an apocalyptic number.

72313919 is a deficient number, since it is larger than the sum of its proper divisors (1).

72313919 is an equidigital number, since it uses as much as digits as its factorization.

72313919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10206, while the sum is 35.

The square root of 72313919 is about 8503.7591099466. The cubic root of 72313919 is about 416.6204971421.

The spelling of 72313919 in words is "seventy-two million, three hundred thirteen thousand, nine hundred nineteen".