72743247 has 12 divisors (see below), whose sum is σ = 105456520. Its totient is φ = 48318768.

The previous prime is 72743243. The next prime is 72743257. The reversal of 72743247 is 74234727.

It is not a de Polignac number, because 72743247 - 2² = 72743243 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 (72743243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12097 + ... + 17082.

Almost surely, 2^72743247 is an apocalyptic number.

72743247 is a deficient number, since it is larger than the sum of its proper divisors (32713273).

72743247 is a wasteful number, since it uses less digits than its factorization.

72743247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29462 (or 29459 counting only the distinct ones).

The product of its digits is 65856, while the sum is 36.

The square root of 72743247 is about 8528.9651775582. The cubic root of 72743247 is about 417.4433632998.

The spelling of 72743247 in words is "seventy-two million, seven hundred forty-three thousand, two hundred forty-seven".