131404643 has 2 divisors, whose sum is σ = 131404644. Its totient is φ = 131404642.

The previous prime is 131404633. The next prime is 131404657. The reversal of 131404643 is 346404131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131404643 - 2¹⁰ = 131403619 is a prime.

It is not a weakly prime, because it can be changed into another prime (131404613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65702321 + 65702322.

It is an arithmetic number, because the mean of its divisors is an integer number (65702322).

Almost surely, 2^131404643 is an apocalyptic number.

131404643 is a deficient number, since it is larger than the sum of its proper divisors (1).

131404643 is an equidigital number, since it uses as much as digits as its factorization.

131404643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 131404643 is about 11463.1864243761. The cubic root of 131404643 is about 508.3976919201.

Adding to 131404643 its reverse (346404131), we get a palindrome (477808774).

The spelling of 131404643 in words is "one hundred thirty-one million, four hundred four thousand, six hundred forty-three".