131251837 has 2 divisors, whose sum is σ = 131251838. Its totient is φ = 131251836.

The previous prime is 131251831. The next prime is 131251847. The reversal of 131251837 is 738152131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127825636 + 3426201 = 11306^2 + 1851^2 .

It is an emirp because it is prime and its reverse (738152131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131251837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131251799 and 131251808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131251831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65625918 + 65625919.

It is an arithmetic number, because the mean of its divisors is an integer number (65625919).

Almost surely, 2^131251837 is an apocalyptic number.

It is an amenable number.

131251837 is a deficient number, since it is larger than the sum of its proper divisors (1).

131251837 is an equidigital number, since it uses as much as digits as its factorization.

131251837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 31.

The square root of 131251837 is about 11456.5194103619. The cubic root of 131251837 is about 508.2005493425.

The spelling of 131251837 in words is "one hundred thirty-one million, two hundred fifty-one thousand, eight hundred thirty-seven".