73686731 has 8 divisors (see below), whose sum is σ = 77651280. Its totient is φ = 69730848.

The previous prime is 73686677. The next prime is 73686751. The reversal of 73686731 is 13768637.

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 73686731 - 2¹⁴ = 73670347 is a prime.

It is a super-2 number, since 2×73686731² = 10859468650932722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73686751) 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, 22745 + ... + 25781.

It is an arithmetic number, because the mean of its divisors is an integer number (9706410).

Almost surely, 2^73686731 is an apocalyptic number.

73686731 is a deficient number, since it is larger than the sum of its proper divisors (3964549).

73686731 is a wasteful number, since it uses less digits than its factorization.

73686731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4333.

The product of its digits is 127008, while the sum is 41.

The square root of 73686731 is about 8584.0975646832. The cubic root of 73686731 is about 419.2403710749.

The spelling of 73686731 in words is "seventy-three million, six hundred eighty-six thousand, seven hundred thirty-one".