3121997 has 8 divisors (see below), whose sum is σ = 3283200. Its totient is φ = 2962960.

The previous prime is 3121981. The next prime is 3122003. The reversal of 3121997 is 7991213.

It is a happy number.

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 3121997 - 2⁴ = 3121981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121927) 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, 2972 + ... + 3882.

It is an arithmetic number, because the mean of its divisors is an integer number (410400).

Almost surely, 2^3121997 is an apocalyptic number.

It is an amenable number.

3121997 is a deficient number, since it is larger than the sum of its proper divisors (161203).

3121997 is a wasteful number, since it uses less digits than its factorization.

3121997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1083.

The product of its digits is 3402, while the sum is 32.

The square root of 3121997 is about 1766.9173721485. The cubic root of 3121997 is about 146.1540408336.

The spelling of 3121997 in words is "three million, one hundred twenty-one thousand, nine hundred ninety-seven".