38387998889 has 2 divisors, whose sum is σ = 38387998890. Its totient is φ = 38387998888.

The previous prime is 38387998853. The next prime is 38387998903. The reversal of 38387998889 is 98889978383.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21372100864 + 17015898025 = 146192^2 + 130445^2 .

It is a cyclic number.

It is not a de Polignac number, because 38387998889 - 2²⁰ = 38386950313 is a prime.

It is not a weakly prime, because it can be changed into another prime (38387998849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19193999444 + 19193999445.

It is an arithmetic number, because the mean of its divisors is an integer number (19193999445).

Almost surely, 2^38387998889 is an apocalyptic number.

It is an amenable number.

38387998889 is a deficient number, since it is larger than the sum of its proper divisors (1).

38387998889 is an equidigital number, since it uses as much as digits as its factorization.

38387998889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1504935936, while the sum is 80.

The spelling of 38387998889 in words is "thirty-eight billion, three hundred eighty-seven million, nine hundred ninety-eight thousand, eight hundred eighty-nine".