2918891 has 2 divisors, whose sum is σ = 2918892. Its totient is φ = 2918890.

The previous prime is 2918887. The next prime is 2918897. The reversal of 2918891 is 1988192.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2918891 - 2² = 2918887 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2918897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1459445 + 1459446.

It is an arithmetic number, because the mean of its divisors is an integer number (1459446).

2^2918891 is an apocalyptic number.

2918891 is a deficient number, since it is larger than the sum of its proper divisors (1).

2918891 is an equidigital number, since it uses as much as digits as its factorization.

2918891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 38.

The square root of 2918891 is about 1708.4762216665. The cubic root of 2918891 is about 142.9132928321.

The spelling of 2918891 in words is "two million, nine hundred eighteen thousand, eight hundred ninety-one".