72613559 has 2 divisors, whose sum is σ = 72613560. Its totient is φ = 72613558.

The previous prime is 72613549. The next prime is 72613577. The reversal of 72613559 is 95531627.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72613559 - 2¹² = 72609463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72613529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36306779 + 36306780.

It is an arithmetic number, because the mean of its divisors is an integer number (36306780).

Almost surely, 2^72613559 is an apocalyptic number.

72613559 is a deficient number, since it is larger than the sum of its proper divisors (1).

72613559 is an equidigital number, since it uses as much as digits as its factorization.

72613559 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 38.

The square root of 72613559 is about 8521.3589878610. The cubic root of 72613559 is about 417.1951404914.

The spelling of 72613559 in words is "seventy-two million, six hundred thirteen thousand, five hundred fifty-nine".