72988613 has 2 divisors, whose sum is σ = 72988614. Its totient is φ = 72988612.

The previous prime is 72988609. The next prime is 72988631. The reversal of 72988613 is 31688927.

Together with next prime (72988631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59320804 + 13667809 = 7702^2 + 3697^2 .

It is a cyclic number.

It is not a de Polignac number, because 72988613 - 2² = 72988609 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72918613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36494306 + 36494307.

It is an arithmetic number, because the mean of its divisors is an integer number (36494307).

Almost surely, 2^72988613 is an apocalyptic number.

It is an amenable number.

72988613 is a deficient number, since it is larger than the sum of its proper divisors (1).

72988613 is an equidigital number, since it uses as much as digits as its factorization.

72988613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 44.

The square root of 72988613 is about 8543.3373455576. The cubic root of 72988613 is about 417.9121878527.

The spelling of 72988613 in words is "seventy-two million, nine hundred eighty-eight thousand, six hundred thirteen".