131903749 has 4 divisors (see below), whose sum is σ = 132252160. Its totient is φ = 131555340.

The previous prime is 131903699. The next prime is 131903789. The reversal of 131903749 is 947309131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131903749 - 2⁷ = 131903621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131903789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173637 + ... + 174394.

It is an arithmetic number, because the mean of its divisors is an integer number (33063040).

Almost surely, 2^131903749 is an apocalyptic number.

It is an amenable number.

131903749 is a deficient number, since it is larger than the sum of its proper divisors (348411).

131903749 is an equidigital number, since it uses as much as digits as its factorization.

131903749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348410.

The product of its (nonzero) digits is 20412, while the sum is 37.

The square root of 131903749 is about 11484.9357420928. The cubic root of 131903749 is about 509.0405503672.

The spelling of 131903749 in words is "one hundred thirty-one million, nine hundred three thousand, seven hundred forty-nine".