6990423 has 16 divisors (see below), whose sum is σ = 10704000. Its totient is φ = 4013280.

The previous prime is 6990419. The next prime is 6990427. The reversal of 6990423 is 3240996.

It is an interprime number because it is at equal distance from previous prime (6990419) and next prime (6990427).

It is not a de Polignac number, because 6990423 - 2² = 6990419 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an Ulam number.

6990423 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990427) 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 15 ways as a sum of consecutive naturals, for example, 4948 + ... + 6201.

It is an arithmetic number, because the mean of its divisors is an integer number (669000).

Almost surely, 2^6990423 is an apocalyptic number.

6990423 is a deficient number, since it is larger than the sum of its proper divisors (3713577).

6990423 is a wasteful number, since it uses less digits than its factorization.

6990423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11182.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 6990423 is about 2643.9408087172. The cubic root of 6990423 is about 191.2058396908.

The spelling of 6990423 in words is "six million, nine hundred ninety thousand, four hundred twenty-three".