388138199 has 2 divisors, whose sum is σ = 388138200. Its totient is φ = 388138198.

The previous prime is 388138183. The next prime is 388138207. The reversal of 388138199 is 991831883.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 388138199 - 2⁴ = 388138183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (388138109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194069099 + 194069100.

It is an arithmetic number, because the mean of its divisors is an integer number (194069100).

Almost surely, 2^388138199 is an apocalyptic number.

388138199 is a deficient number, since it is larger than the sum of its proper divisors (1).

388138199 is an equidigital number, since it uses as much as digits as its factorization.

388138199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 50.

The square root of 388138199 is about 19701.2232868926. The cubic root of 388138199 is about 729.4498882982.

The spelling of 388138199 in words is "three hundred eighty-eight million, one hundred thirty-eight thousand, one hundred ninety-nine".