72394913 has 2 divisors, whose sum is σ = 72394914. Its totient is φ = 72394912.

The previous prime is 72394909. The next prime is 72394969. The reversal of 72394913 is 31949327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66716224 + 5678689 = 8168^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 72394913 - 2² = 72394909 is a prime.

It is not a weakly prime, because it can be changed into another prime (72394213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36197456 + 36197457.

It is an arithmetic number, because the mean of its divisors is an integer number (36197457).

Almost surely, 2^72394913 is an apocalyptic number.

It is an amenable number.

72394913 is a deficient number, since it is larger than the sum of its proper divisors (1).

72394913 is an equidigital number, since it uses as much as digits as its factorization.

72394913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824, while the sum is 38.

The square root of 72394913 is about 8508.5200240700. The cubic root of 72394913 is about 416.7759820556.

The spelling of 72394913 in words is "seventy-two million, three hundred ninety-four thousand, nine hundred thirteen".