131401637 has 2 divisors, whose sum is σ = 131401638. Its totient is φ = 131401636.

The previous prime is 131401607. The next prime is 131401651. The reversal of 131401637 is 736104131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86229796 + 45171841 = 9286^2 + 6721^2 .

It is a cyclic number.

It is not a de Polignac number, because 131401637 - 2²⁰ = 130353061 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131401607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65700818 + 65700819.

It is an arithmetic number, because the mean of its divisors is an integer number (65700819).

Almost surely, 2^131401637 is an apocalyptic number.

It is an amenable number.

131401637 is a deficient number, since it is larger than the sum of its proper divisors (1).

131401637 is an equidigital number, since it uses as much as digits as its factorization.

131401637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 131401637 is about 11463.0553082501. The cubic root of 131401637 is about 508.3938152049.

Adding to 131401637 its reverse (736104131), we get a palindrome (867505768).

The spelling of 131401637 in words is "one hundred thirty-one million, four hundred one thousand, six hundred thirty-seven".