72713647 has 4 divisors (see below), whose sum is σ = 73905736. Its totient is φ = 71521560.

The previous prime is 72713633. The next prime is 72713651. The reversal of 72713647 is 74631727.

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 72713647 - 2⁷ = 72713519 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 (72713617) 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, 595953 + ... + 596074.

It is an arithmetic number, because the mean of its divisors is an integer number (18476434).

Almost surely, 2^72713647 is an apocalyptic number.

72713647 is a deficient number, since it is larger than the sum of its proper divisors (1192089).

72713647 is a wasteful number, since it uses less digits than its factorization.

72713647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1192088.

The product of its digits is 49392, while the sum is 37.

The square root of 72713647 is about 8527.2297377284. The cubic root of 72713647 is about 417.3867349051.

The spelling of 72713647 in words is "seventy-two million, seven hundred thirteen thousand, six hundred forty-seven".