131309638 has 8 divisors (see below), whose sum is σ = 197080632. Its totient is φ = 65616096.

The previous prime is 131309617. The next prime is 131309657. The reversal of 131309638 is 836903131.

131309638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14920 + ... + 22027.

It is an arithmetic number, because the mean of its divisors is an integer number (24635079).

Almost surely, 2^131309638 is an apocalyptic number.

131309638 is a deficient number, since it is larger than the sum of its proper divisors (65770994).

131309638 is a wasteful number, since it uses less digits than its factorization.

131309638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38726.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 131309638 is about 11459.0417574944. The cubic root of 131309638 is about 508.2751392548.

The spelling of 131309638 in words is "one hundred thirty-one million, three hundred nine thousand, six hundred thirty-eight".