6131999 has 2 divisors, whose sum is σ = 6132000. Its totient is φ = 6131998.

The previous prime is 6131989. The next prime is 6132029. The reversal of 6131999 is 9991316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6131999 - 2²⁰ = 5083423 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 (6131989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3065999 + 3066000.

It is an arithmetic number, because the mean of its divisors is an integer number (3066000).

Almost surely, 2^6131999 is an apocalyptic number.

6131999 is a deficient number, since it is larger than the sum of its proper divisors (1).

6131999 is an equidigital number, since it uses as much as digits as its factorization.

6131999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13122, while the sum is 38.

The square root of 6131999 is about 2476.2873419698. The cubic root of 6131999 is about 183.0349500766.

The spelling of 6131999 in words is "six million, one hundred thirty-one thousand, nine hundred ninety-nine".