131418437 has 2 divisors, whose sum is σ = 131418438. Its totient is φ = 131418436.

The previous prime is 131418433. The next prime is 131418467. The reversal of 131418437 is 734814131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112487236 + 18931201 = 10606^2 + 4351^2 .

It is a cyclic number.

It is not a de Polignac number, because 131418437 - 2² = 131418433 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131418433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65709218 + 65709219.

It is an arithmetic number, because the mean of its divisors is an integer number (65709219).

Almost surely, 2^131418437 is an apocalyptic number.

It is an amenable number.

131418437 is a deficient number, since it is larger than the sum of its proper divisors (1).

131418437 is an equidigital number, since it uses as much as digits as its factorization.

131418437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 131418437 is about 11463.7880737564. The cubic root of 131418437 is about 508.4154807192.

The spelling of 131418437 in words is "one hundred thirty-one million, four hundred eighteen thousand, four hundred thirty-seven".