6990251 has 2 divisors, whose sum is σ = 6990252. Its totient is φ = 6990250.

The previous prime is 6990241. The next prime is 6990253. The reversal of 6990251 is 1520996.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6990251 - 2⁶ = 6990187 is a prime.

Together with 6990253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6990253) 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, 3495125 + 3495126.

It is an arithmetic number, because the mean of its divisors is an integer number (3495126).

Almost surely, 2^6990251 is an apocalyptic number.

6990251 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990251 is an equidigital number, since it uses as much as digits as its factorization.

6990251 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 6990251 is about 2643.9082813139. The cubic root of 6990251 is about 191.2042714655.

The spelling of 6990251 in words is "six million, nine hundred ninety thousand, two hundred fifty-one".