3204991 has 2 divisors, whose sum is σ = 3204992. Its totient is φ = 3204990.

The previous prime is 3204983. The next prime is 3205003. The reversal of 3204991 is 1994023.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3204991 - 2³ = 3204983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3204911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1602495 + 1602496.

It is an arithmetic number, because the mean of its divisors is an integer number (1602496).

Almost surely, 2^3204991 is an apocalyptic number.

3204991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3204991 is an equidigital number, since it uses as much as digits as its factorization.

3204991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 3204991 is about 1790.2488653816. The cubic root of 3204991 is about 147.4378326546.

The spelling of 3204991 in words is "three million, two hundred four thousand, nine hundred ninety-one".