38634889 has 2 divisors, whose sum is σ = 38634890. Its totient is φ = 38634888.

The previous prime is 38634887. The next prime is 38634977. The reversal of 38634889 is 98843683.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24255625 + 14379264 = 4925^2 + 3792^2 .

It is an emirp because it is prime and its reverse (98843683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38634889 - 2¹ = 38634887 is a prime.

Together with 38634887, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (38634887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19317444 + 19317445.

It is an arithmetic number, because the mean of its divisors is an integer number (19317445).

Almost surely, 2^38634889 is an apocalyptic number.

It is an amenable number.

38634889 is a deficient number, since it is larger than the sum of its proper divisors (1).

38634889 is an equidigital number, since it uses as much as digits as its factorization.

38634889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 49.

The square root of 38634889 is about 6215.6969842488. The cubic root of 38634889 is about 338.0595608307.

The spelling of 38634889 in words is "thirty-eight million, six hundred thirty-four thousand, eight hundred eighty-nine".