4002423391 has 2 divisors, whose sum is σ = 4002423392. Its totient is φ = 4002423390.

The previous prime is 4002423379. The next prime is 4002423413. The reversal of 4002423391 is 1933242004.

4002423391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4002423391 - 2¹⁷ = 4002292319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4002423301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2001211695 + 2001211696.

It is an arithmetic number, because the mean of its divisors is an integer number (2001211696).

Almost surely, 2^4002423391 is an apocalyptic number.

4002423391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4002423391 is an equidigital number, since it uses as much as digits as its factorization.

4002423391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 4002423391 is about 63264.7088905023. The cubic root of 4002423391 is about 1587.7215617021.

Adding to 4002423391 its reverse (1933242004), we get a palindrome (5935665395).

The spelling of 4002423391 in words is "four billion, two million, four hundred twenty-three thousand, three hundred ninety-one".