6919889 has 4 divisors (see below), whose sum is σ = 7014756. Its totient is φ = 6825024.

The previous prime is 6919879. The next prime is 6919897. The reversal of 6919889 is 9889196.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1420864 + 5499025 = 1192^2 + 2345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6919889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6919879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47324 + ... + 47469.

It is an arithmetic number, because the mean of its divisors is an integer number (1753689).

Almost surely, 2^6919889 is an apocalyptic number.

It is an amenable number.

6919889 is a deficient number, since it is larger than the sum of its proper divisors (94867).

6919889 is an equidigital number, since it uses as much as digits as its factorization.

6919889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94866.

The product of its digits is 279936, while the sum is 50.

The square root of 6919889 is about 2630.5681895743. The cubic root of 6919889 is about 190.5605697868.

The spelling of 6919889 in words is "six million, nine hundred nineteen thousand, eight hundred eighty-nine".