73158731 has 8 divisors (see below), whose sum is σ = 75732480. Its totient is φ = 70616448.

The previous prime is 73158727. The next prime is 73158739. The reversal of 73158731 is 13785137.

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 73158731 - 2² = 73158727 is a prime.

It is a super-2 number, since 2×73158731² = 10704399843060722, 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 = 73158691 and 73158700.

It is not an unprimeable number, because it can be changed into a prime (73158739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3086 + ... + 12483.

It is an arithmetic number, because the mean of its divisors is an integer number (9466560).

Almost surely, 2^73158731 is an apocalyptic number.

73158731 is a deficient number, since it is larger than the sum of its proper divisors (2573749).

73158731 is a wasteful number, since it uses less digits than its factorization.

73158731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15733.

The product of its digits is 17640, while the sum is 35.

The square root of 73158731 is about 8553.2877304578. The cubic root of 73158731 is about 418.2366184715.

The spelling of 73158731 in words is "seventy-three million, one hundred fifty-eight thousand, seven hundred thirty-one".