72199399 has 2 divisors, whose sum is σ = 72199400. Its totient is φ = 72199398.

The previous prime is 72199367. The next prime is 72199441. The reversal of 72199399 is 99399127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72199399 - 2⁵ = 72199367 is a prime.

It is a super-2 number, since 2×72199399² = 10425506431922402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72199199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36099699 + 36099700.

It is an arithmetic number, because the mean of its divisors is an integer number (36099700).

Almost surely, 2^72199399 is an apocalyptic number.

72199399 is a deficient number, since it is larger than the sum of its proper divisors (1).

72199399 is an equidigital number, since it uses as much as digits as its factorization.

72199399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 49.

The square root of 72199399 is about 8497.0229492452. The cubic root of 72199399 is about 416.4004538077.

The spelling of 72199399 in words is "seventy-two million, one hundred ninety-nine thousand, three hundred ninety-nine".