3920997 has 8 divisors (see below), whose sum is σ = 5238720. Its totient is φ = 2608640.

The previous prime is 3920989. The next prime is 3921023. The reversal of 3920997 is 7990293.

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

It is a cyclic number.

It is not a de Polignac number, because 3920997 - 2³ = 3920989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3920947) 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, 904 + ... + 2942.

It is an arithmetic number, because the mean of its divisors is an integer number (654840).

Almost surely, 2^3920997 is an apocalyptic number.

It is an amenable number.

3920997 is a deficient number, since it is larger than the sum of its proper divisors (1317723).

3920997 is a wasteful number, since it uses less digits than its factorization.

3920997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 3920997 is about 1980.1507518368. The cubic root of 3920997 is about 157.6880696187.

The spelling of 3920997 in words is "three million, nine hundred twenty thousand, nine hundred ninety-seven".