2649391 has 2 divisors, whose sum is σ = 2649392. Its totient is φ = 2649390.

The previous prime is 2649371. The next prime is 2649397. The reversal of 2649391 is 1939462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2649391 - 2⁹ = 2648879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2649397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324695 + 1324696.

It is an arithmetic number, because the mean of its divisors is an integer number (1324696).

2^2649391 is an apocalyptic number.

2649391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649391 is an equidigital number, since it uses as much as digits as its factorization.

2649391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 34.

The square root of 2649391 is about 1627.6949959989. The cubic root of 2649391 is about 138.3721489114.

The spelling of 2649391 in words is "two million, six hundred forty-nine thousand, three hundred ninety-one".