72477427 has 6 divisors (see below), whose sum is σ = 79665404. Its totient is φ = 65888460.

The previous prime is 72477407. The next prime is 72477437.

It is a happy number.

72477427 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-72477427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72477427.

It is not an unprimeable number, because it can be changed into a prime (72477407) 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, 299373 + ... + 299614.

Almost surely, 2^72477427 is an apocalyptic number.

72477427 is a deficient number, since it is larger than the sum of its proper divisors (7187977).

72477427 is a wasteful number, since it uses less digits than its factorization.

72477427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599009 (or 598998 counting only the distinct ones).

The product of its digits is 153664, while the sum is 40.

The square root of 72477427 is about 8513.3675475689. The cubic root of 72477427 is about 416.9342657188.

The spelling of 72477427 in words is "seventy-two million, four hundred seventy-seven thousand, four hundred twenty-seven".