131898407 has 2 divisors, whose sum is σ = 131898408. Its totient is φ = 131898406.

The previous prime is 131898383. The next prime is 131898413. The reversal of 131898407 is 704898131.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131898407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131808407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65949203 + 65949204.

It is an arithmetic number, because the mean of its divisors is an integer number (65949204).

Almost surely, 2^131898407 is an apocalyptic number.

131898407 is a deficient number, since it is larger than the sum of its proper divisors (1).

131898407 is an equidigital number, since it uses as much as digits as its factorization.

131898407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 131898407 is about 11484.7031742227. The cubic root of 131898407 is about 509.0336783580.

The spelling of 131898407 in words is "one hundred thirty-one million, eight hundred ninety-eight thousand, four hundred seven".