72387147 has 16 divisors (see below), whose sum is σ = 111703040. Its totient is φ = 40839552.

The previous prime is 72387143. The next prime is 72387151. The reversal of 72387147 is 74178327.

It is an interprime number because it is at equal distance from previous prime (72387143) and next prime (72387151).

It is not a de Polignac number, because 72387147 - 2² = 72387143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72387143) 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, 20158 + ... + 23475.

It is an arithmetic number, because the mean of its divisors is an integer number (6981440).

Almost surely, 2^72387147 is an apocalyptic number.

72387147 is a deficient number, since it is larger than the sum of its proper divisors (39315893).

72387147 is a wasteful number, since it uses less digits than its factorization.

72387147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43722.

The product of its digits is 65856, while the sum is 39.

The square root of 72387147 is about 8508.0636457422. The cubic root of 72387147 is about 416.7610786235.

The spelling of 72387147 in words is "seventy-two million, three hundred eighty-seven thousand, one hundred forty-seven".