131808946 has 16 divisors (see below), whose sum is σ = 200844288. Its totient is φ = 64864800.

The previous prime is 131808923. The next prime is 131808961. The reversal of 131808946 is 649808131.

It is a junction number, because it is equal to n+sod(n) for n = 131808899 and 131808908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132511 + ... + 133501.

It is an arithmetic number, because the mean of its divisors is an integer number (12552768).

Almost surely, 2^131808946 is an apocalyptic number.

131808946 is a deficient number, since it is larger than the sum of its proper divisors (69035342).

131808946 is an equidigital number, since it uses as much as digits as its factorization.

131808946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1977.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 131808946 is about 11480.8077241978. The cubic root of 131808946 is about 508.9185671335.

The spelling of 131808946 in words is "one hundred thirty-one million, eight hundred eight thousand, nine hundred forty-six".