131406404 has 6 divisors (see below), whose sum is σ = 229961214. Its totient is φ = 65703200.

The previous prime is 131406403. The next prime is 131406419. The reversal of 131406404 is 404604131.

It can be written as a sum of positive squares in only one way, i.e., 78145600 + 53260804 = 8840^2 + 7298^2 .

It is a super-2 number, since 2×131406404² = 34535286024422432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131406404.

It is not an unprimeable number, because it can be changed into a prime (131406403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16425797 + ... + 16425804.

It is an arithmetic number, because the mean of its divisors is an integer number (38326869).

Almost surely, 2^131406404 is an apocalyptic number.

It is an amenable number.

131406404 is a deficient number, since it is larger than the sum of its proper divisors (98554810).

131406404 is a wasteful number, since it uses less digits than its factorization.

131406404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32851605 (or 32851603 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 131406404 is about 11463.2632352223. The cubic root of 131406404 is about 508.3999629822.

The spelling of 131406404 in words is "one hundred thirty-one million, four hundred six thousand, four hundred four".