72972299 has 2 divisors, whose sum is σ = 72972300. Its totient is φ = 72972298.

The previous prime is 72972271. The next prime is 72972301. The reversal of 72972299 is 99227927.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72972299 - 2²⁰ = 71923723 is a prime.

Together with 72972301, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72972209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36486149 + 36486150.

It is an arithmetic number, because the mean of its divisors is an integer number (36486150).

Almost surely, 2^72972299 is an apocalyptic number.

72972299 is a deficient number, since it is larger than the sum of its proper divisors (1).

72972299 is an equidigital number, since it uses as much as digits as its factorization.

72972299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 72972299 is about 8542.3825130932. The cubic root of 72972299 is about 417.8810490801.

The spelling of 72972299 in words is "seventy-two million, nine hundred seventy-two thousand, two hundred ninety-nine".