3179921 has 2 divisors, whose sum is σ = 3179922. Its totient is φ = 3179920.

The previous prime is 3179873. The next prime is 3179941. The reversal of 3179921 is 1299713.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2739025 + 440896 = 1655^2 + 664^2 .

It is a cyclic number.

It is not a de Polignac number, because 3179921 - 2¹⁰ = 3178897 is a prime.

It is a super-2 number, since 2×3179921² = 20223795132482, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3179941) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1589960 + 1589961.

It is an arithmetic number, because the mean of its divisors is an integer number (1589961).

Almost surely, 2^3179921 is an apocalyptic number.

It is an amenable number.

3179921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3179921 is an equidigital number, since it uses as much as digits as its factorization.

3179921 is an evil number, because the sum of its binary digits is even.

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

The square root of 3179921 is about 1783.2332993750. The cubic root of 3179921 is about 147.0523977522.

The spelling of 3179921 in words is "three million, one hundred seventy-nine thousand, nine hundred twenty-one".