131626399 has 2 divisors, whose sum is σ = 131626400. Its totient is φ = 131626398.

The previous prime is 131626387. The next prime is 131626421. The reversal of 131626399 is 993626131.

It is a weak prime.

It is an emirp because it is prime and its reverse (993626131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131626399 - 2⁹ = 131625887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131626379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65813199 + 65813200.

It is an arithmetic number, because the mean of its divisors is an integer number (65813200).

Almost surely, 2^131626399 is an apocalyptic number.

131626399 is a deficient number, since it is larger than the sum of its proper divisors (1).

131626399 is an equidigital number, since it uses as much as digits as its factorization.

131626399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 40.

The square root of 131626399 is about 11472.8548757491. The cubic root of 131626399 is about 508.6835186508.

The spelling of 131626399 in words is "one hundred thirty-one million, six hundred twenty-six thousand, three hundred ninety-nine".