73686131 has 4 divisors (see below), whose sum is σ = 74785992. Its totient is φ = 72586272.

The previous prime is 73686121. The next prime is 73686139. The reversal of 73686131 is 13168637.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 73686131 - 2¹⁴ = 73669747 is a prime.

It is a super-2 number, since 2×73686131² = 10859291803498322, 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 = 73686091 and 73686100.

It is not an unprimeable number, because it can be changed into a prime (73686139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 549830 + ... + 549963.

It is an arithmetic number, because the mean of its divisors is an integer number (18696498).

Almost surely, 2^73686131 is an apocalyptic number.

73686131 is a deficient number, since it is larger than the sum of its proper divisors (1099861).

73686131 is a wasteful number, since it uses less digits than its factorization.

73686131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099860.

The product of its digits is 18144, while the sum is 35.

The square root of 73686131 is about 8584.0626162674. The cubic root of 73686131 is about 419.2392331726.

The spelling of 73686131 in words is "seventy-three million, six hundred eighty-six thousand, one hundred thirty-one".