38687399 has 2 divisors, whose sum is σ = 38687400. Its totient is φ = 38687398.

The previous prime is 38687371. The next prime is 38687413. The reversal of 38687399 is 99378683.

38687399 is digitally balanced in base 2, 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 38687399 - 2²⁰ = 37638823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38687399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38687329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19343699 + 19343700.

It is an arithmetic number, because the mean of its divisors is an integer number (19343700).

Almost surely, 2^38687399 is an apocalyptic number.

38687399 is a deficient number, since it is larger than the sum of its proper divisors (1).

38687399 is an equidigital number, since it uses as much as digits as its factorization.

38687399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 38687399 is about 6219.9195332416. The cubic root of 38687399 is about 338.2126476031.

The spelling of 38687399 in words is "thirty-eight million, six hundred eighty-seven thousand, three hundred ninety-nine".