72545399 has 2 divisors, whose sum is σ = 72545400. Its totient is φ = 72545398.

The previous prime is 72545377. The next prime is 72545449. The reversal of 72545399 is 99354527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72545399 - 2¹² = 72541303 is a 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 (72545309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36272699 + 36272700.

It is an arithmetic number, because the mean of its divisors is an integer number (36272700).

Almost surely, 2^72545399 is an apocalyptic number.

72545399 is a deficient number, since it is larger than the sum of its proper divisors (1).

72545399 is an equidigital number, since it uses as much as digits as its factorization.

72545399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 44.

The square root of 72545399 is about 8517.3586868230. The cubic root of 72545399 is about 417.0645637638.

The spelling of 72545399 in words is "seventy-two million, five hundred forty-five thousand, three hundred ninety-nine".