131898439 has 2 divisors, whose sum is σ = 131898440. Its totient is φ = 131898438.

The previous prime is 131898433. The next prime is 131898463. The reversal of 131898439 is 934898131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 131898439 - 2⁵ = 131898407 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 (131898433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65949219 + 65949220.

It is an arithmetic number, because the mean of its divisors is an integer number (65949220).

Almost surely, 2^131898439 is an apocalyptic number.

131898439 is a deficient number, since it is larger than the sum of its proper divisors (1).

131898439 is an equidigital number, since it uses as much as digits as its factorization.

131898439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 46.

The square root of 131898439 is about 11484.7045673800. The cubic root of 131898439 is about 509.0337195237.

The spelling of 131898439 in words is "one hundred thirty-one million, eight hundred ninety-eight thousand, four hundred thirty-nine".