72772197 has 4 divisors (see below), whose sum is σ = 97029600. Its totient is φ = 48514796.

The previous prime is 72772177. The next prime is 72772243. The reversal of 72772197 is 79127727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72772197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72772177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12128697 + ... + 12128702.

It is an arithmetic number, because the mean of its divisors is an integer number (24257400).

Almost surely, 2^72772197 is an apocalyptic number.

It is an amenable number.

72772197 is a deficient number, since it is larger than the sum of its proper divisors (24257403).

72772197 is a wasteful number, since it uses less digits than its factorization.

72772197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24257402.

The product of its digits is 86436, while the sum is 42.

The square root of 72772197 is about 8530.6621665613. The cubic root of 72772197 is about 417.4987333080.

The spelling of 72772197 in words is "seventy-two million, seven hundred seventy-two thousand, one hundred ninety-seven".