72620771 has 4 divisors (see below), whose sum is σ = 72922344. Its totient is φ = 72319200.

The previous prime is 72620749. The next prime is 72620789. The reversal of 72620771 is 17702627.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72620771 - 2²⁶ = 5511907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72620731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150425 + ... + 150906.

It is an arithmetic number, because the mean of its divisors is an integer number (18230586).

Almost surely, 2^72620771 is an apocalyptic number.

72620771 is a deficient number, since it is larger than the sum of its proper divisors (301573).

72620771 is a wasteful number, since it uses less digits than its factorization.

72620771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 301572.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 72620771 is about 8521.7821492925. The cubic root of 72620771 is about 417.2089520154.

The spelling of 72620771 in words is "seventy-two million, six hundred twenty thousand, seven hundred seventy-one".