131787492 has 12 divisors (see below), whose sum is σ = 307504176. Its totient is φ = 43929160.

The previous prime is 131787473. The next prime is 131787499. The reversal of 131787492 is 294787131.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (131787499) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5491134 + ... + 5491157.

It is an arithmetic number, because the mean of its divisors is an integer number (25625348).

Almost surely, 2^131787492 is an apocalyptic number.

131787492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

131787492 is an abundant number, since it is smaller than the sum of its proper divisors (175716684).

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

131787492 is a wasteful number, since it uses less digits than its factorization.

131787492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10982298 (or 10982296 counting only the distinct ones).

The product of its digits is 84672, while the sum is 42.

The square root of 131787492 is about 11479.8733442491. The cubic root of 131787492 is about 508.8909541080.

The spelling of 131787492 in words is "one hundred thirty-one million, seven hundred eighty-seven thousand, four hundred ninety-two".