131709990 has 32 divisors (see below), whose sum is σ = 317882880. Its totient is φ = 34925024.

The previous prime is 131709953. The next prime is 131709997. The reversal of 131709990 is 99907131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131709997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6894 + ... + 17633.

It is an arithmetic number, because the mean of its divisors is an integer number (9933840).

Almost surely, 2^131709990 is an apocalyptic number.

131709990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131709990 is an abundant number, since it is smaller than the sum of its proper divisors (186172890).

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

131709990 is a wasteful number, since it uses less digits than its factorization.

131709990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24716.

The product of its (nonzero) digits is 15309, while the sum is 39.

The square root of 131709990 is about 11476.4972879359. The cubic root of 131709990 is about 508.7911778191.

The spelling of 131709990 in words is "one hundred thirty-one million, seven hundred nine thousand, nine hundred ninety".