131903971 has 4 divisors (see below), whose sum is σ = 132018552. Its totient is φ = 131789392.

The previous prime is 131903953. The next prime is 131904007. The reversal of 131903971 is 179309131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179309131 = 4999 ⋅35869.

It is a cyclic number.

It is not a de Polignac number, because 131903971 - 2⁵ = 131903939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131973971) 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, 55546 + ... + 57871.

It is an arithmetic number, because the mean of its divisors is an integer number (33004638).

Almost surely, 2^131903971 is an apocalyptic number.

131903971 is a deficient number, since it is larger than the sum of its proper divisors (114581).

131903971 is a wasteful number, since it uses less digits than its factorization.

131903971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114580.

The product of its (nonzero) digits is 5103, while the sum is 34.

The square root of 131903971 is about 11484.9454069229. The cubic root of 131903971 is about 509.0408359465.

It can be divided in two parts, 13190 and 3971, that added together give a square (17161 = 131²).

The spelling of 131903971 in words is "one hundred thirty-one million, nine hundred three thousand, nine hundred seventy-one".