6791990 has 16 divisors (see below), whose sum is σ = 12262320. Its totient is φ = 2708640.

The previous prime is 6791971. The next prime is 6791999. The reversal of 6791990 is 991976.

It is a happy number.

It is a super-2 number, since 2×6791990² = 92262256320200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6791999) 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 7 ways as a sum of consecutive naturals, for example, 3380 + ... + 5000.

It is an arithmetic number, because the mean of its divisors is an integer number (766395).

Almost surely, 2^6791990 is an apocalyptic number.

6791990 is a deficient number, since it is larger than the sum of its proper divisors (5470330).

6791990 is a wasteful number, since it uses less digits than its factorization.

6791990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047.

The product of its (nonzero) digits is 30618, while the sum is 41.

The square root of 6791990 is about 2606.1446621398. The cubic root of 6791990 is about 189.3792297922.

The spelling of 6791990 in words is "six million, seven hundred ninety-one thousand, nine hundred ninety".