72722573 has 24 divisors (see below), whose sum is σ = 95351424. Its totient is φ = 54188640.

The previous prime is 72722569. The next prime is 72722591. The reversal of 72722573 is 37522727.

It is a happy number.

It is not a de Polignac number, because 72722573 - 2² = 72722569 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72722543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17615 + ... + 21347.

It is an arithmetic number, because the mean of its divisors is an integer number (3972976).

Almost surely, 2^72722573 is an apocalyptic number.

It is an amenable number.

72722573 is a deficient number, since it is larger than the sum of its proper divisors (22628851).

72722573 is a wasteful number, since it uses less digits than its factorization.

72722573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3785 (or 3774 counting only the distinct ones).

The product of its digits is 41160, while the sum is 35.

The square root of 72722573 is about 8527.7531038369. The cubic root of 72722573 is about 417.4038130452.

The spelling of 72722573 in words is "seventy-two million, seven hundred twenty-two thousand, five hundred seventy-three".