6991904419 has 2 divisors, whose sum is σ = 6991904420. Its totient is φ = 6991904418.

The previous prime is 6991904399. The next prime is 6991904473. The reversal of 6991904419 is 9144091996.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6991904419 - 2⁹ = 6991903907 is a prime.

It is a super-2 number, since 2×6991904419² = 97773454808863455122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6991904819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495952209 + 3495952210.

It is an arithmetic number, because the mean of its divisors is an integer number (3495952210).

Almost surely, 2^6991904419 is an apocalyptic number.

6991904419 is a deficient number, since it is larger than the sum of its proper divisors (1).

6991904419 is an equidigital number, since it uses as much as digits as its factorization.

6991904419 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 629856, while the sum is 52.

The square root of 6991904419 is about 83617.6083071024. The cubic root of 6991904419 is about 1912.1934559533.

The spelling of 6991904419 in words is "six billion, nine hundred ninety-one million, nine hundred four thousand, four hundred nineteen".