131789790 has 48 divisors (see below), whose sum is σ = 373806576. Its totient is φ = 31948800.

The previous prime is 131789789. The next prime is 131789803. The reversal of 131789790 is 97987131.

131789790 = 5132² + 5133² + ... + 5136².

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65571 + ... + 67550.

It is an arithmetic number, because the mean of its divisors is an integer number (7787637).

Almost surely, 2^131789790 is an apocalyptic number.

131789790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

131789790 is an abundant number, since it is smaller than the sum of its proper divisors (242016786).

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

131789790 is a wasteful number, since it uses less digits than its factorization.

131789790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133145 (or 133142 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 131789790 is about 11479.9734320250. The cubic root of 131789790 is about 508.8939119623.

The spelling of 131789790 in words is "one hundred thirty-one million, seven hundred eighty-nine thousand, seven hundred ninety".