131658604 has 48 divisors (see below), whose sum is σ = 293965056. Its totient is φ = 50097600.

The previous prime is 131658587. The next prime is 131658613. The reversal of 131658604 is 406856131.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 131658604.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8274 + ... + 18214.

It is an arithmetic number, because the mean of its divisors is an integer number (6124272).

Almost surely, 2^131658604 is an apocalyptic number.

131658604 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131658604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146982528).

131658604 is an abundant number, since it is smaller than the sum of its proper divisors (162306452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131658604 is a wasteful number, since it uses less digits than its factorization.

131658604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006 (or 10004 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 131658604 is about 11474.2583202576. The cubic root of 131658604 is about 508.7250017599.

The spelling of 131658604 in words is "one hundred thirty-one million, six hundred fifty-eight thousand, six hundred four".