72747371 has 16 divisors (see below), whose sum is σ = 78140160. Its totient is φ = 67528800.

The previous prime is 72747361. The next prime is 72747373. The reversal of 72747371 is 17374727.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 72747371 - 2⁶ = 72747307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72747373) 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, 320360 + ... + 320586.

It is an arithmetic number, because the mean of its divisors is an integer number (4883760).

Almost surely, 2^72747371 is an apocalyptic number.

72747371 is a deficient number, since it is larger than the sum of its proper divisors (5392789).

72747371 is a wasteful number, since it uses less digits than its factorization.

72747371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514.

The product of its digits is 57624, while the sum is 38.

The square root of 72747371 is about 8529.2069385143. The cubic root of 72747371 is about 417.4512517933.

The spelling of 72747371 in words is "seventy-two million, seven hundred forty-seven thousand, three hundred seventy-one".