38865979 has 2 divisors, whose sum is σ = 38865980. Its totient is φ = 38865978.

The previous prime is 38865977. The next prime is 38866019. The reversal of 38865979 is 97956883.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 38865979 - 2¹ = 38865977 is a prime.

Together with 38865977, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (38865977) 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, 19432989 + 19432990.

It is an arithmetic number, because the mean of its divisors is an integer number (19432990).

Almost surely, 2^38865979 is an apocalyptic number.

38865979 is a deficient number, since it is larger than the sum of its proper divisors (1).

38865979 is an equidigital number, since it uses as much as digits as its factorization.

38865979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 55.

The square root of 38865979 is about 6234.2584964052. The cubic root of 38865979 is about 338.7322424573.

The spelling of 38865979 in words is "thirty-eight million, eight hundred sixty-five thousand, nine hundred seventy-nine".