72971299 has 2 divisors, whose sum is σ = 72971300. Its totient is φ = 72971298.

The previous prime is 72971291. The next prime is 72971321. The reversal of 72971299 is 99217927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72971299 - 2³ = 72971291 is a prime.

It is not a weakly prime, because it can be changed into another prime (72971291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36485649 + 36485650.

It is an arithmetic number, because the mean of its divisors is an integer number (36485650).

Almost surely, 2^72971299 is an apocalyptic number.

72971299 is a deficient number, since it is larger than the sum of its proper divisors (1).

72971299 is an equidigital number, since it uses as much as digits as its factorization.

72971299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142884, while the sum is 46.

The square root of 72971299 is about 8542.3239812126. The cubic root of 72971299 is about 417.8791402144.

The spelling of 72971299 in words is "seventy-two million, nine hundred seventy-one thousand, two hundred ninety-nine".