6990887 has 6 divisors (see below), whose sum is σ = 7073208. Its totient is φ = 6909504.

The previous prime is 6990881. The next prime is 6990889. The reversal of 6990887 is 7880996.

It is not a de Polignac number, because 6990887 - 2⁴ = 6990871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990881) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9038 + ... + 9780.

It is an arithmetic number, because the mean of its divisors is an integer number (1178868).

Almost surely, 2^6990887 is an apocalyptic number.

6990887 is a deficient number, since it is larger than the sum of its proper divisors (82321).

6990887 is an frugal number, since it uses more digits than its factorization.

6990887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 840 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 6990887 is about 2644.0285550652. The cubic root of 6990887 is about 191.2100701237.

The spelling of 6990887 in words is "six million, nine hundred ninety thousand, eight hundred eighty-seven".