72173716 has 12 divisors (see below), whose sum is σ = 126829780. Its totient is φ = 35936640.

The previous prime is 72173707. The next prime is 72173753. The reversal of 72173716 is 61737127.

It can be written as a sum of positive squares in 2 ways, for example, as 36723600 + 35450116 = 6060^2 + 5954^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36471 + ... + 38398.

Almost surely, 2^72173716 is an apocalyptic number.

It is an amenable number.

72173716 is a deficient number, since it is larger than the sum of its proper divisors (54656064).

72173716 is a wasteful number, since it uses less digits than its factorization.

72173716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75114 (or 75112 counting only the distinct ones).

The product of its digits is 12348, while the sum is 34.

The square root of 72173716 is about 8495.5115207973. The cubic root of 72173716 is about 416.3510735204.

The spelling of 72173716 in words is "seventy-two million, one hundred seventy-three thousand, seven hundred sixteen".