38948939 has 2 divisors, whose sum is σ = 38948940. Its totient is φ = 38948938.

The previous prime is 38948891. The next prime is 38948941. The reversal of 38948939 is 93984983.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38948939 is a prime.

It is a Sophie Germain prime.

Together with 38948941, 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 (38948969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19474469 + 19474470.

It is an arithmetic number, because the mean of its divisors is an integer number (19474470).

Almost surely, 2^38948939 is an apocalyptic number.

38948939 is a deficient number, since it is larger than the sum of its proper divisors (1).

38948939 is an equidigital number, since it uses as much as digits as its factorization.

38948939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 53.

The square root of 38948939 is about 6240.9085075812. The cubic root of 38948939 is about 338.9730808209.

The spelling of 38948939 in words is "thirty-eight million, nine hundred forty-eight thousand, nine hundred thirty-nine".