6990189919 has 2 divisors, whose sum is σ = 6990189920. Its totient is φ = 6990189918.

The previous prime is 6990189911. The next prime is 6990189949. The reversal of 6990189919 is 9199810996.

6990189919 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6990189919 - 2³ = 6990189911 is a prime.

It is a super-2 number, since 2×6990189919² = 97725510207378453122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6990189911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495094959 + 3495094960.

It is an arithmetic number, because the mean of its divisors is an integer number (3495094960).

Almost surely, 2^6990189919 is an apocalyptic number.

6990189919 is a deficient number, since it is larger than the sum of its proper divisors (1).

6990189919 is an equidigital number, since it uses as much as digits as its factorization.

6990189919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2834352, while the sum is 61.

The square root of 6990189919 is about 83607.3556512823. The cubic root of 6990189919 is about 1912.0371454790.

The spelling of 6990189919 in words is "six billion, nine hundred ninety million, one hundred eighty-nine thousand, nine hundred nineteen".