131313437 has 2 divisors, whose sum is σ = 131313438. Its totient is φ = 131313436.

The previous prime is 131313431. The next prime is 131313449. The reversal of 131313437 is 734313131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86007076 + 45306361 = 9274^2 + 6731^2 .

It is a cyclic number.

It is not a de Polignac number, because 131313437 - 2¹⁰ = 131312413 is a prime.

It is a super-3 number, since 3×131313437³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131313431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65656718 + 65656719.

It is an arithmetic number, because the mean of its divisors is an integer number (65656719).

Almost surely, 2^131313437 is an apocalyptic number.

It is an amenable number.

131313437 is a deficient number, since it is larger than the sum of its proper divisors (1).

131313437 is an equidigital number, since it uses as much as digits as its factorization.

131313437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 26.

The square root of 131313437 is about 11459.2075205923. The cubic root of 131313437 is about 508.2800409478.

Adding to 131313437 its reverse (734313131), we get a palindrome (865626568).

The spelling of 131313437 in words is "one hundred thirty-one million, three hundred thirteen thousand, four hundred thirty-seven".