2044391 has 2 divisors, whose sum is σ = 2044392. Its totient is φ = 2044390.

The previous prime is 2044363. The next prime is 2044411. The reversal of 2044391 is 1934402.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2044391 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2044321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1022195 + 1022196.

It is an arithmetic number, because the mean of its divisors is an integer number (1022196).

2^2044391 is an apocalyptic number.

2044391 is a deficient number, since it is larger than the sum of its proper divisors (1).

2044391 is an equidigital number, since it uses as much as digits as its factorization.

2044391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2044391 is about 1429.8220168958. The cubic root of 2044391 is about 126.9174448491.

Adding to 2044391 its reverse (1934402), we get a palindrome (3978793).

The spelling of 2044391 in words is "two million, forty-four thousand, three hundred ninety-one".