4138750391 has 2 divisors, whose sum is σ = 4138750392. Its totient is φ = 4138750390.

The previous prime is 4138750309. The next prime is 4138750397. The reversal of 4138750391 is 1930578314.

4138750391 is digitally balanced in base 3, because in such base 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 4138750391 - 2¹⁸ = 4138488247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4138750397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2069375195 + 2069375196.

It is an arithmetic number, because the mean of its divisors is an integer number (2069375196).

Almost surely, 2^4138750391 is an apocalyptic number.

4138750391 is a deficient number, since it is larger than the sum of its proper divisors (1).

4138750391 is an equidigital number, since it uses as much as digits as its factorization.

4138750391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 4138750391 is about 64333.1204823767. The cubic root of 4138750391 is about 1605.5472027738.

The spelling of 4138750391 in words is "four billion, one hundred thirty-eight million, seven hundred fifty thousand, three hundred ninety-one".