6991459 has 2 divisors, whose sum is σ = 6991460. Its totient is φ = 6991458.

The previous prime is 6991447. The next prime is 6991463. The reversal of 6991459 is 9541996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6991459 - 2⁵ = 6991427 is a prime.

It is not a weakly prime, because it can be changed into another prime (6994459) 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, 3495729 + 3495730.

It is an arithmetic number, because the mean of its divisors is an integer number (3495730).

Almost surely, 2^6991459 is an apocalyptic number.

6991459 is a deficient number, since it is larger than the sum of its proper divisors (1).

6991459 is an equidigital number, since it uses as much as digits as its factorization.

6991459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 43.

The square root of 6991459 is about 2644.1367211247. The cubic root of 6991459 is about 191.2152849688.

The spelling of 6991459 in words is "six million, nine hundred ninety-one thousand, four hundred fifty-nine".