6998857 has 2 divisors, whose sum is σ = 6998858. Its totient is φ = 6998856.

The previous prime is 6998851. The next prime is 6998861. The reversal of 6998857 is 7588996.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6702921 + 295936 = 2589^2 + 544^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6998857 is a prime.

It is not a weakly prime, because it can be changed into another prime (6998851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3499428 + 3499429.

It is an arithmetic number, because the mean of its divisors is an integer number (3499429).

Almost surely, 2^6998857 is an apocalyptic number.

It is an amenable number.

6998857 is a deficient number, since it is larger than the sum of its proper divisors (1).

6998857 is an equidigital number, since it uses as much as digits as its factorization.

6998857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 52.

The square root of 6998857 is about 2645.5352955498. The cubic root of 6998857 is about 191.2827058993.

The spelling of 6998857 in words is "six million, nine hundred ninety-eight thousand, eight hundred fifty-seven".