6888999959 has 2 divisors, whose sum is σ = 6888999960. Its totient is φ = 6888999958.

The previous prime is 6888999911. The next prime is 6888999973. The reversal of 6888999959 is 9599998886.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6888999959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6888990959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3444499979 + 3444499980.

It is an arithmetic number, because the mean of its divisors is an integer number (3444499980).

Almost surely, 2^6888999959 is an apocalyptic number.

6888999959 is a deficient number, since it is larger than the sum of its proper divisors (1).

6888999959 is an equidigital number, since it uses as much as digits as its factorization.

6888999959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 906992640, while the sum is 80.

The square root of 6888999959 is about 82999.9997530120. Note that the first 3 decimals coincide. The cubic root of 6888999959 is about 1902.7660505019.

The spelling of 6888999959 in words is "six billion, eight hundred eighty-eight million, nine hundred ninety-nine thousand, nine hundred fifty-nine".