131912789 has 2 divisors, whose sum is σ = 131912790. Its totient is φ = 131912788.

The previous prime is 131912783. The next prime is 131912791. The reversal of 131912789 is 987219131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117722500 + 14190289 = 10850^2 + 3767^2 .

It is a cyclic number.

It is not a de Polignac number, because 131912789 - 2²⁰ = 130864213 is a prime.

Together with 131912791, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131912783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65956394 + 65956395.

It is an arithmetic number, because the mean of its divisors is an integer number (65956395).

Almost surely, 2^131912789 is an apocalyptic number.

It is an amenable number.

131912789 is a deficient number, since it is larger than the sum of its proper divisors (1).

131912789 is an equidigital number, since it uses as much as digits as its factorization.

131912789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 41.

The square root of 131912789 is about 11485.3292943651. The cubic root of 131912789 is about 509.0521791027.

The spelling of 131912789 in words is "one hundred thirty-one million, nine hundred twelve thousand, seven hundred eighty-nine".