38780939 has 2 divisors, whose sum is σ = 38780940. Its totient is φ = 38780938.

The previous prime is 38780909. The next prime is 38780941. The reversal of 38780939 is 93908783.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38780939 - 2¹⁶ = 38715403 is a prime.

It is a super-2 number, since 2×38780939² = 3007922459443442, which contains 22 as substring.

Together with 38780941, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 38780893 and 38780902.

It is not a weakly prime, because it can be changed into another prime (38780909) 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, 19390469 + 19390470.

It is an arithmetic number, because the mean of its divisors is an integer number (19390470).

Almost surely, 2^38780939 is an apocalyptic number.

38780939 is a deficient number, since it is larger than the sum of its proper divisors (1).

38780939 is an equidigital number, since it uses as much as digits as its factorization.

38780939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 38780939 is about 6227.4343834359. The cubic root of 38780939 is about 338.4850097399.

The spelling of 38780939 in words is "thirty-eight million, seven hundred eighty thousand, nine hundred thirty-nine".