6978199 has 2 divisors, whose sum is σ = 6978200. Its totient is φ = 6978198.

The previous prime is 6978173. The next prime is 6978221. The reversal of 6978199 is 9918796.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6978199 - 2⁹ = 6977687 is a prime.

It is a super-2 number, since 2×6978199² = 97390522567202, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6988199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3489099 + 3489100.

It is an arithmetic number, because the mean of its divisors is an integer number (3489100).

Almost surely, 2^6978199 is an apocalyptic number.

6978199 is a deficient number, since it is larger than the sum of its proper divisors (1).

6978199 is an equidigital number, since it uses as much as digits as its factorization.

6978199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 49.

The square root of 6978199 is about 2641.6280964587. The cubic root of 6978199 is about 191.0943221711.

The spelling of 6978199 in words is "six million, nine hundred seventy-eight thousand, one hundred ninety-nine".