72399611 has 2 divisors, whose sum is σ = 72399612. Its totient is φ = 72399610.

The previous prime is 72399581. The next prime is 72399637. The reversal of 72399611 is 11699327.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (11699327) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72399611 is a prime.

It is not a weakly prime, because it can be changed into another prime (72399641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36199805 + 36199806.

It is an arithmetic number, because the mean of its divisors is an integer number (36199806).

Almost surely, 2^72399611 is an apocalyptic number.

72399611 is a deficient number, since it is larger than the sum of its proper divisors (1).

72399611 is an equidigital number, since it uses as much as digits as its factorization.

72399611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 38.

The square root of 72399611 is about 8508.7960958058. The cubic root of 72399611 is about 416.7849972895.

The spelling of 72399611 in words is "seventy-two million, three hundred ninety-nine thousand, six hundred eleven".