72813619 has 2 divisors, whose sum is σ = 72813620. Its totient is φ = 72813618.

The previous prime is 72813547. The next prime is 72813623. The reversal of 72813619 is 91631827.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72813619 is a prime.

It is a super-2 number, since 2×72813619² = 10603646223754322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72813649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36406809 + 36406810.

It is an arithmetic number, because the mean of its divisors is an integer number (36406810).

Almost surely, 2^72813619 is an apocalyptic number.

72813619 is a deficient number, since it is larger than the sum of its proper divisors (1).

72813619 is an equidigital number, since it uses as much as digits as its factorization.

72813619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 37.

The square root of 72813619 is about 8533.0896514686. The cubic root of 72813619 is about 417.5779318348.

The spelling of 72813619 in words is "seventy-two million, eight hundred thirteen thousand, six hundred nineteen".