72116399 has 2 divisors, whose sum is σ = 72116400. Its totient is φ = 72116398.

The previous prime is 72116371. The next prime is 72116423. The reversal of 72116399 is 99361127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72116399 - 2¹² = 72112303 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72116699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36058199 + 36058200.

It is an arithmetic number, because the mean of its divisors is an integer number (36058200).

Almost surely, 2^72116399 is an apocalyptic number.

72116399 is a deficient number, since it is larger than the sum of its proper divisors (1).

72116399 is an equidigital number, since it uses as much as digits as its factorization.

72116399 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 72116399 is about 8492.1374812234. The cubic root of 72116399 is about 416.2408287951.

The spelling of 72116399 in words is "seventy-two million, one hundred sixteen thousand, three hundred ninety-nine".