6990031 has 4 divisors (see below), whose sum is σ = 7000600. Its totient is φ = 6979464.

The previous prime is 6990019. The next prime is 6990041. The reversal of 6990031 is 1300996.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 6990031 - 2⁹ = 6989519 is a prime.

It is a super-2 number, since 2×6990031² = 97721066761922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4221 + ... + 5638.

It is an arithmetic number, because the mean of its divisors is an integer number (1750150).

Almost surely, 2^6990031 is an apocalyptic number.

6990031 is a deficient number, since it is larger than the sum of its proper divisors (10569).

6990031 is an equidigital number, since it uses as much as digits as its factorization.

6990031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10568.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 6990031 is about 2643.8666759124. The cubic root of 6990031 is about 191.2022655585.

It can be divided in two parts, 69 and 90031, that added together give a triangular number (90100 = T₄₂₄).

The spelling of 6990031 in words is "six million, nine hundred ninety thousand, thirty-one".