3097921 has 2 divisors, whose sum is σ = 3097922. Its totient is φ = 3097920.

The previous prime is 3097909. The next prime is 3097951. The reversal of 3097921 is 1297903.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2689600 + 408321 = 1640^2 + 639^2 .

It is a cyclic number.

It is not a de Polignac number, because 3097921 - 2⁷ = 3097793 is a prime.

It is a super-2 number, since 2×3097921² = 19194229044482, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3097951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1548960 + 1548961.

It is an arithmetic number, because the mean of its divisors is an integer number (1548961).

Almost surely, 2^3097921 is an apocalyptic number.

It is an amenable number.

3097921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3097921 is an equidigital number, since it uses as much as digits as its factorization.

3097921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 3097921 is about 1760.0911908194. The cubic root of 3097921 is about 145.7773707088. Note that the first 3 decimals are identical.

The spelling of 3097921 in words is "three million, ninety-seven thousand, nine hundred twenty-one".