131394478 has 16 divisors (see below), whose sum is σ = 199938816. Its totient is φ = 64752120.

The previous prime is 131394457. The next prime is 131394491. The reversal of 131394478 is 874493131.

131394478 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a self number, because there is not a number n which added to its sum of digits gives 131394478.

It is a congruent number.

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, 106123 + ... + 107353.

It is an arithmetic number, because the mean of its divisors is an integer number (12496176).

Almost surely, 2^131394478 is an apocalyptic number.

131394478 is a deficient number, since it is larger than the sum of its proper divisors (68544338).

131394478 is a wasteful number, since it uses less digits than its factorization.

131394478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1959.

The product of its digits is 72576, while the sum is 40.

The square root of 131394478 is about 11462.7430399534. The cubic root of 131394478 is about 508.3845822976.

The spelling of 131394478 in words is "one hundred thirty-one million, three hundred ninety-four thousand, four hundred seventy-eight".