2951891 has 2 divisors, whose sum is σ = 2951892. Its totient is φ = 2951890.

The previous prime is 2951887. The next prime is 2951933. The reversal of 2951891 is 1981592.

2951891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2951891 - 2² = 2951887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2951801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1475945 + 1475946.

It is an arithmetic number, because the mean of its divisors is an integer number (1475946).

2^2951891 is an apocalyptic number.

2951891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2951891 is an equidigital number, since it uses as much as digits as its factorization.

2951891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6480, while the sum is 35.

The square root of 2951891 is about 1718.1068069244. The cubic root of 2951891 is about 143.4498523718.

Subtracting from 2951891 its reverse (1981592), we obtain a cube (970299 = 99³).

The spelling of 2951891 in words is "two million, nine hundred fifty-one thousand, eight hundred ninety-one".