71732731 has 8 divisors (see below), whose sum is σ = 83370240. Its totient is φ = 60442728.

The previous prime is 71732723. The next prime is 71732737. The reversal of 71732731 is 13723717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71732731 - 2³ = 71732723 is a prime.

It is a super-2 number, since 2×71732731² = 10291169393436722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71732693 and 71732702.

It is not an unprimeable number, because it can be changed into a prime (71732737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86431 + ... + 87256.

It is an arithmetic number, because the mean of its divisors is an integer number (10421280).

Almost surely, 2^71732731 is an apocalyptic number.

71732731 is a deficient number, since it is larger than the sum of its proper divisors (11637509).

71732731 is a wasteful number, since it uses less digits than its factorization.

71732731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173753.

The product of its digits is 6174, while the sum is 31.

The square root of 71732731 is about 8469.5177548666. The cubic root of 71732731 is about 415.5013653106.

The spelling of 71732731 in words is "seventy-one million, seven hundred thirty-two thousand, seven hundred thirty-one".