72299393 has 2 divisors, whose sum is σ = 72299394. Its totient is φ = 72299392.

The previous prime is 72299387. The next prime is 72299401. The reversal of 72299393 is 39399227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66064384 + 6235009 = 8128^2 + 2497^2 .

It is a cyclic number.

It is not a de Polignac number, because 72299393 - 2⁴ = 72299377 is a prime.

It is not a weakly prime, because it can be changed into another prime (72299303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36149696 + 36149697.

It is an arithmetic number, because the mean of its divisors is an integer number (36149697).

Almost surely, 2^72299393 is an apocalyptic number.

It is an amenable number.

72299393 is a deficient number, since it is larger than the sum of its proper divisors (1).

72299393 is an equidigital number, since it uses as much as digits as its factorization.

72299393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 44.

The square root of 72299393 is about 8502.9049741838. The cubic root of 72299393 is about 416.5925991722.

The spelling of 72299393 in words is "seventy-two million, two hundred ninety-nine thousand, three hundred ninety-three".