73980731 has 6 divisors (see below), whose sum is σ = 81317796. Its totient is φ = 67255100.

The previous prime is 73980727. The next prime is 73980743. The reversal of 73980731 is 13708937.

It is a happy number.

It is not a de Polignac number, because 73980731 - 2² = 73980727 is a prime.

It is a super-2 number, since 2×73980731² = 10946297118588722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73980701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 305585 + ... + 305826.

It is an arithmetic number, because the mean of its divisors is an integer number (13552966).

Almost surely, 2^73980731 is an apocalyptic number.

73980731 is a deficient number, since it is larger than the sum of its proper divisors (7337065).

73980731 is a wasteful number, since it uses less digits than its factorization.

73980731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611433 (or 611422 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 73980731 is about 8601.2052062487. The cubic root of 73980731 is about 419.7972017917.

The spelling of 73980731 in words is "seventy-three million, nine hundred eighty thousand, seven hundred thirty-one".