72764197 has 6 divisors (see below), whose sum is σ = 79980614. Its totient is φ = 66149160.

The previous prime is 72764189. The next prime is 72764201. The reversal of 72764197 is 79146727.

It can be written as a sum of positive squares in only one way, i.e., 50495236 + 22268961 = 7106^2 + 4719^2 .

It is not a de Polignac number, because 72764197 - 2³ = 72764189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72764897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 300558 + ... + 300799.

Almost surely, 2^72764197 is an apocalyptic number.

It is an amenable number.

72764197 is a deficient number, since it is larger than the sum of its proper divisors (7216417).

72764197 is a wasteful number, since it uses less digits than its factorization.

72764197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601379 (or 601368 counting only the distinct ones).

The product of its digits is 148176, while the sum is 43.

The square root of 72764197 is about 8530.1932568964. The cubic root of 72764197 is about 417.4834339107.

The spelling of 72764197 in words is "seventy-two million, seven hundred sixty-four thousand, one hundred ninety-seven".