72309599 has 2 divisors, whose sum is σ = 72309600. Its totient is φ = 72309598.

The previous prime is 72309593. The next prime is 72309661. The reversal of 72309599 is 99590327.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72309599 - 2¹⁶ = 72244063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72309593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36154799 + 36154800.

It is an arithmetic number, because the mean of its divisors is an integer number (36154800).

Almost surely, 2^72309599 is an apocalyptic number.

72309599 is a deficient number, since it is larger than the sum of its proper divisors (1).

72309599 is an equidigital number, since it uses as much as digits as its factorization.

72309599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 72309599 is about 8503.5051008393. The cubic root of 72309599 is about 416.6122007384.

The spelling of 72309599 in words is "seventy-two million, three hundred nine thousand, five hundred ninety-nine".