72345899 has 2 divisors, whose sum is σ = 72345900. Its totient is φ = 72345898.

The previous prime is 72345811. The next prime is 72345913. The reversal of 72345899 is 99854327.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (99854327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72345899 - 2²⁰ = 71297323 is a prime.

It is not a weakly prime, because it can be changed into another prime (72345499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36172949 + 36172950.

It is an arithmetic number, because the mean of its divisors is an integer number (36172950).

Almost surely, 2^72345899 is an apocalyptic number.

72345899 is a deficient number, since it is larger than the sum of its proper divisors (1).

72345899 is an equidigital number, since it uses as much as digits as its factorization.

72345899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 47.

The square root of 72345899 is about 8505.6392469937. The cubic root of 72345899 is about 416.6819033006.

The spelling of 72345899 in words is "seventy-two million, three hundred forty-five thousand, eight hundred ninety-nine".