2651791 has 2 divisors, whose sum is σ = 2651792. Its totient is φ = 2651790.

The previous prime is 2651783. The next prime is 2651807. The reversal of 2651791 is 1971562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2651791 - 2³ = 2651783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2651741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1325895 + 1325896.

It is an arithmetic number, because the mean of its divisors is an integer number (1325896).

2^2651791 is an apocalyptic number.

2651791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2651791 is an equidigital number, since it uses as much as digits as its factorization.

2651791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 31.

The square root of 2651791 is about 1628.4320679721. The cubic root of 2651791 is about 138.4139186276.

The spelling of 2651791 in words is "two million, six hundred fifty-one thousand, seven hundred ninety-one".