4044399991 has 2 divisors, whose sum is σ = 4044399992. Its totient is φ = 4044399990.

The previous prime is 4044399929. The next prime is 4044400049. The reversal of 4044399991 is 1999934404.

4044399991 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4044399991 - 2¹⁷ = 4044268919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4044399091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022199995 + 2022199996.

It is an arithmetic number, because the mean of its divisors is an integer number (2022199996).

Almost surely, 2^4044399991 is an apocalyptic number.

4044399991 is a deficient number, since it is larger than the sum of its proper divisors (1).

4044399991 is an equidigital number, since it uses as much as digits as its factorization.

4044399991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 52.

The square root of 4044399991 is about 63595.5972611312. The cubic root of 4044399991 is about 1593.2528361856.

The spelling of 4044399991 in words is "four billion, forty-four million, three hundred ninety-nine thousand, nine hundred ninety-one".