131905868 has 12 divisors (see below), whose sum is σ = 238281792. Its totient is φ = 63825360.

The previous prime is 131905867. The next prime is 131905871. The reversal of 131905868 is 868509131.

It is not an unprimeable number, because it can be changed into a prime (131905861) 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, 531755 + ... + 532002.

It is an arithmetic number, because the mean of its divisors is an integer number (19856816).

Almost surely, 2^131905868 is an apocalyptic number.

It is an amenable number.

131905868 is a deficient number, since it is larger than the sum of its proper divisors (106375924).

131905868 is a wasteful number, since it uses less digits than its factorization.

131905868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063792 (or 1063790 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 131905868 is about 11485.0279930003. The cubic root of 131905868 is about 509.0432762213.

The spelling of 131905868 in words is "one hundred thirty-one million, nine hundred five thousand, eight hundred sixty-eight".