72312619 has 2 divisors, whose sum is σ = 72312620. Its totient is φ = 72312618.

The previous prime is 72312601. The next prime is 72312629. The reversal of 72312619 is 91621327.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72312619 is a prime.

It is a super-2 number, since 2×72312619² = 10458229733278322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72312629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36156309 + 36156310.

It is an arithmetic number, because the mean of its divisors is an integer number (36156310).

Almost surely, 2^72312619 is an apocalyptic number.

72312619 is a deficient number, since it is larger than the sum of its proper divisors (1).

72312619 is an equidigital number, since it uses as much as digits as its factorization.

72312619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 31.

The square root of 72312619 is about 8503.6826728189. The cubic root of 72312619 is about 416.6180005739.

The spelling of 72312619 in words is "seventy-two million, three hundred twelve thousand, six hundred nineteen".