72997227 has 8 divisors (see below), whose sum is σ = 108144080. Its totient is φ = 48664800.

The previous prime is 72997207. The next prime is 72997229. The reversal of 72997227 is 72279927.

It is not a de Polignac number, because 72997227 - 2¹² = 72993131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72997229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1351774 + ... + 1351827.

It is an arithmetic number, because the mean of its divisors is an integer number (13518010).

Almost surely, 2^72997227 is an apocalyptic number.

72997227 is a deficient number, since it is larger than the sum of its proper divisors (35146853).

72997227 is a wasteful number, since it uses less digits than its factorization.

72997227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2703610 (or 2703604 counting only the distinct ones).

The product of its digits is 222264, while the sum is 45.

The square root of 72997227 is about 8543.8414662258. The cubic root of 72997227 is about 417.9286276498.

The spelling of 72997227 in words is "seventy-two million, nine hundred ninety-seven thousand, two hundred twenty-seven".