6997990 has 32 divisors (see below), whose sum is σ = 13284000. Its totient is φ = 2650368.

The previous prime is 6997967. The next prime is 6998009. The reversal of 6997990 is 997996.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16906 + ... + 17314.

It is an arithmetic number, because the mean of its divisors is an integer number (415125).

Almost surely, 2^6997990 is an apocalyptic number.

6997990 is a deficient number, since it is larger than the sum of its proper divisors (6286010).

6997990 is a wasteful number, since it uses less digits than its factorization.

6997990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 6997990 is about 2645.3714294972. The cubic root of 6997990 is about 191.2748070403.

The spelling of 6997990 in words is "six million, nine hundred ninety-seven thousand, nine hundred ninety".