4243044391 has 2 divisors, whose sum is σ = 4243044392. Its totient is φ = 4243044390.

The previous prime is 4243044371. The next prime is 4243044437. The reversal of 4243044391 is 1934403424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4243044391 - 2⁵ = 4243044359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243044371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121522195 + 2121522196.

It is an arithmetic number, because the mean of its divisors is an integer number (2121522196).

Almost surely, 2^4243044391 is an apocalyptic number.

4243044391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243044391 is an equidigital number, since it uses as much as digits as its factorization.

4243044391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 4243044391 is about 65138.6551212105. The cubic root of 4243044391 is about 1618.9217525189.

The spelling of 4243044391 in words is "four billion, two hundred forty-three million, forty-four thousand, three hundred ninety-one".