6917990 has 8 divisors (see below), whose sum is σ = 12452400. Its totient is φ = 2767192.

The previous prime is 6917983. The next prime is 6917993. The reversal of 6917990 is 997196.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6917993) 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, 345890 + ... + 345909.

It is an arithmetic number, because the mean of its divisors is an integer number (1556550).

Almost surely, 2^6917990 is an apocalyptic number.

6917990 is a deficient number, since it is larger than the sum of its proper divisors (5534410).

6917990 is a wasteful number, since it uses less digits than its factorization.

6917990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691806.

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

The square root of 6917990 is about 2630.2072161714. The cubic root of 6917990 is about 190.5431365770.

The spelling of 6917990 in words is "six million, nine hundred seventeen thousand, nine hundred ninety".