4138991999 has 2 divisors, whose sum is σ = 4138992000. Its totient is φ = 4138991998.

The previous prime is 4138991963. The next prime is 4138992041. The reversal of 4138991999 is 9991998314.

It is a happy number.

4138991999 is digitally balanced in base 3, 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 4138991999 - 2¹² = 4138987903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4138991299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069495999 + 2069496000.

It is an arithmetic number, because the mean of its divisors is an integer number (2069496000).

Almost surely, 2^4138991999 is an apocalyptic number.

4138991999 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138991999 is an equidigital number, since it uses as much as digits as its factorization.

4138991999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5668704, while the sum is 62.

The square root of 4138991999 is about 64334.9982435688. The cubic root of 4138991999 is about 1605.5784445307.

The spelling of 4138991999 in words is "four billion, one hundred thirty-eight million, nine hundred ninety-one thousand, nine hundred ninety-nine".