6990877 has 4 divisors (see below), whose sum is σ = 7003260. Its totient is φ = 6978496.

The previous prime is 6990871. The next prime is 6990881. The reversal of 6990877 is 7780996.

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 1819801 + 5171076 = 1349^2 + 2274^2 .

It is a cyclic number.

It is not a de Polignac number, because 6990877 - 2⁷ = 6990749 is a prime.

It is a super-2 number, since 2×6990877² = 97744722458258, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990871) 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, 5302 + ... + 6487.

It is an arithmetic number, because the mean of its divisors is an integer number (1750815).

Almost surely, 2^6990877 is an apocalyptic number.

It is an amenable number.

6990877 is a deficient number, since it is larger than the sum of its proper divisors (12383).

6990877 is a wasteful number, since it uses less digits than its factorization.

6990877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12382.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 6990877 is about 2644.0266640108. The cubic root of 6990877 is about 191.2099789526.

The spelling of 6990877 in words is "six million, nine hundred ninety thousand, eight hundred seventy-seven".