72427797 has 16 divisors (see below), whose sum is σ = 115554880. Its totient is φ = 44570736.

The previous prime is 72427793. The next prime is 72427879. The reversal of 72427797 is 79772427.

It is a happy number.

It is not a de Polignac number, because 72427797 - 2² = 72427793 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 (72427793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102823 + ... + 103524.

It is an arithmetic number, because the mean of its divisors is an integer number (7222180).

Almost surely, 2^72427797 is an apocalyptic number.

It is an amenable number.

72427797 is a deficient number, since it is larger than the sum of its proper divisors (43127083).

72427797 is a wasteful number, since it uses less digits than its factorization.

72427797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206369 (or 206363 counting only the distinct ones).

The product of its digits is 345744, while the sum is 45.

The square root of 72427797 is about 8510.4522206520. The cubic root of 72427797 is about 416.8390766674.

The spelling of 72427797 in words is "seventy-two million, four hundred twenty-seven thousand, seven hundred ninety-seven".