72957847 has 4 divisors (see below), whose sum is σ = 73014480. Its totient is φ = 72901216.

The previous prime is 72957809. The next prime is 72957869. The reversal of 72957847 is 74875927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72957847 - 2¹⁵ = 72925079 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 72957847.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72957947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26338 + ... + 28975.

It is an arithmetic number, because the mean of its divisors is an integer number (18253620).

Almost surely, 2^72957847 is an apocalyptic number.

72957847 is a deficient number, since it is larger than the sum of its proper divisors (56633).

72957847 is a wasteful number, since it uses less digits than its factorization.

72957847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56632.

The product of its digits is 987840, while the sum is 49.

The square root of 72957847 is about 8541.5365713670. The cubic root of 72957847 is about 417.8534604575.

The spelling of 72957847 in words is "seventy-two million, nine hundred fifty-seven thousand, eight hundred forty-seven".