131945403 has 16 divisors (see below), whose sum is σ = 180804096. Its totient is φ = 85548960.

The previous prime is 131945327. The next prime is 131945413. The reversal of 131945403 is 304549131.

It is not a de Polignac number, because 131945403 - 2⁸ = 131945147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131945413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20113 + ... + 25853.

It is an arithmetic number, because the mean of its divisors is an integer number (11300256).

Almost surely, 2^131945403 is an apocalyptic number.

131945403 is a deficient number, since it is larger than the sum of its proper divisors (48858693).

131945403 is a wasteful number, since it uses less digits than its factorization.

131945403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5954.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 131945403 is about 11486.7490178901. The cubic root of 131945403 is about 509.0941281810.

The spelling of 131945403 in words is "one hundred thirty-one million, nine hundred forty-five thousand, four hundred three".