6990381 has 28 divisors (see below), whose sum is σ = 10772608. Its totient is φ = 4531464.

The previous prime is 6990371. The next prime is 6990419. The reversal of 6990381 is 1830996.

It is not a de Polignac number, because 6990381 - 2⁶ = 6990317 is a prime.

It is a super-2 number, since 2×6990381² = 97730853050322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990331) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 31236 + ... + 31458.

It is an arithmetic number, because the mean of its divisors is an integer number (384736).

Almost surely, 2^6990381 is an apocalyptic number.

It is an amenable number.

6990381 is a deficient number, since it is larger than the sum of its proper divisors (3782227).

6990381 is an equidigital number, since it uses as much as digits as its factorization.

6990381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 6990381 is about 2643.9328660161. The cubic root of 6990381 is about 191.2054567545.

The spelling of 6990381 in words is "six million, nine hundred ninety thousand, three hundred eighty-one".