73730731 has 8 divisors (see below), whose sum is σ = 77349600. Its totient is φ = 70183680.

The previous prime is 73730729. The next prime is 73730737. The reversal of 73730731 is 13703737.

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 73730731 - 2¹ = 73730729 is a prime.

It is a super-2 number, since 2×73730731² = 10872441387588722, 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 = 73730693 and 73730702.

It is not an unprimeable number, because it can be changed into a prime (73730737) 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, 15846 + ... + 19963.

It is an arithmetic number, because the mean of its divisors is an integer number (9668700).

Almost surely, 2^73730731 is an apocalyptic number.

73730731 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

73730731 is a deficient number, since it is larger than the sum of its proper divisors (3618869).

73730731 is a wasteful number, since it uses less digits than its factorization.

73730731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35909.

The product of its (nonzero) digits is 9261, while the sum is 31.

The square root of 73730731 is about 8586.6600608153. The cubic root of 73730731 is about 419.3238004146.

The spelling of 73730731 in words is "seventy-three million, seven hundred thirty thousand, seven hundred thirty-one".