3009991 has 2 divisors, whose sum is σ = 3009992. Its totient is φ = 3009990.

The previous prime is 3009977. The next prime is 3010001. The reversal of 3009991 is 1999003.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3009991 - 2⁵ = 3009959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3009931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1504995 + 1504996.

It is an arithmetic number, because the mean of its divisors is an integer number (1504996).

Almost surely, 2^3009991 is an apocalyptic number.

3009991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3009991 is an equidigital number, since it uses as much as digits as its factorization.

3009991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 31.

The square root of 3009991 is about 1734.9325635309. The cubic root of 3009991 is about 144.3848853510.

The spelling of 3009991 in words is "three million, nine thousand, nine hundred ninety-one".