4000668239 has 2 divisors, whose sum is σ = 4000668240. Its totient is φ = 4000668238.

The previous prime is 4000668229. The next prime is 4000668263. The reversal of 4000668239 is 9328660004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4000668239 - 2²⁸ = 3732232783 is a prime.

It is a super-2 number, since 2×4000668239² = 32010692717086722242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000668209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000334119 + 2000334120.

It is an arithmetic number, because the mean of its divisors is an integer number (2000334120).

Almost surely, 2^4000668239 is an apocalyptic number.

4000668239 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000668239 is an equidigital number, since it uses as much as digits as its factorization.

4000668239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 4000668239 is about 63250.8358758997. The cubic root of 4000668239 is about 1587.4894439871.

The spelling of 4000668239 in words is "four billion, six hundred sixty-eight thousand, two hundred thirty-nine".