131987699 has 8 divisors (see below), whose sum is σ = 139104000. Its totient is φ = 124888392.

The previous prime is 131987693. The next prime is 131987719. The reversal of 131987699 is 996789131.

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 131987699 - 2¹⁶ = 131922163 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131987699.

It is not an unprimeable number, because it can be changed into a prime (131987693) 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, 13682 + ... + 21240.

It is an arithmetic number, because the mean of its divisors is an integer number (17388000).

Almost surely, 2^131987699 is an apocalyptic number.

131987699 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

131987699 is a deficient number, since it is larger than the sum of its proper divisors (7116301).

131987699 is an equidigital number, since it uses as much as digits as its factorization.

131987699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8497.

The product of its digits is 734832, while the sum is 53.

The square root of 131987699 is about 11488.5899482922. The cubic root of 131987699 is about 509.1485202360.

The spelling of 131987699 in words is "one hundred thirty-one million, nine hundred eighty-seven thousand, six hundred ninety-nine".