131976687 has 8 divisors (see below), whose sum is σ = 178951680. Its totient is φ = 86493080.

The previous prime is 131976659. The next prime is 131976697. The reversal of 131976687 is 786679131.

It is a happy number.

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 131976687 - 2¹⁰ = 131975663 is a prime.

It is a super-2 number, since 2×131976687² = 34835691822991938, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131976697) 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, 372639 + ... + 372992.

It is an arithmetic number, because the mean of its divisors is an integer number (22368960).

Almost surely, 2^131976687 is an apocalyptic number.

131976687 is a deficient number, since it is larger than the sum of its proper divisors (46974993).

131976687 is an equidigital number, since it uses as much as digits as its factorization.

131976687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745693.

The product of its digits is 381024, while the sum is 48.

The square root of 131976687 is about 11488.1106801771. The cubic root of 131976687 is about 509.1343600794.

The spelling of 131976687 in words is "one hundred thirty-one million, nine hundred seventy-six thousand, six hundred eighty-seven".