3193921 has 2 divisors, whose sum is σ = 3193922. Its totient is φ = 3193920.

The previous prime is 3193913. The next prime is 3193937. The reversal of 3193921 is 1293913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2143296 + 1050625 = 1464^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 3193921 - 2³ = 3193913 is a prime.

It is a super-2 number, since 2×3193921² = 20402262708482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3193921.

It is not a weakly prime, because it can be changed into another prime (3193901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1596960 + 1596961.

It is an arithmetic number, because the mean of its divisors is an integer number (1596961).

Almost surely, 2^3193921 is an apocalyptic number.

It is an amenable number.

3193921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3193921 is an equidigital number, since it uses as much as digits as its factorization.

3193921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1458, while the sum is 28.

The square root of 3193921 is about 1787.1544421230. The cubic root of 3193921 is about 147.2678873465.

It can be divided in two parts, 3193 and 921, that added together give a palindrome (4114).

The spelling of 3193921 in words is "three million, one hundred ninety-three thousand, nine hundred twenty-one".