73131691 has 8 divisors (see below), whose sum is σ = 75153584. Its totient is φ = 71124480.

The previous prime is 73131683. The next prime is 73131701. The reversal of 73131691 is 19613137.

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 73131691 - 2³ = 73131683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73131631) 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, 6835 + ... + 13891.

It is an arithmetic number, because the mean of its divisors is an integer number (9394198).

Almost surely, 2^73131691 is an apocalyptic number.

73131691 is a deficient number, since it is larger than the sum of its proper divisors (2021893).

73131691 is a wasteful number, since it uses less digits than its factorization.

73131691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7341.

The product of its digits is 3402, while the sum is 31.

The square root of 73131691 is about 8551.7069056417. The cubic root of 73131691 is about 418.1850843547.

The spelling of 73131691 in words is "seventy-three million, one hundred thirty-one thousand, six hundred ninety-one".