38638711 has 2 divisors, whose sum is σ = 38638712. Its totient is φ = 38638710.

The previous prime is 38638709. The next prime is 38638729. The reversal of 38638711 is 11783683.

It is a weak prime.

It is an emirp because it is prime and its reverse (11783683) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 38638711 - 2¹ = 38638709 is a prime.

Together with 38638709, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38638751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19319355 + 19319356.

It is an arithmetic number, because the mean of its divisors is an integer number (19319356).

Almost surely, 2^38638711 is an apocalyptic number.

38638711 is a deficient number, since it is larger than the sum of its proper divisors (1).

38638711 is an equidigital number, since it uses as much as digits as its factorization.

38638711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 38638711 is about 6216.0044240653. The cubic root of 38638711 is about 338.0707081043.

The spelling of 38638711 in words is "thirty-eight million, six hundred thirty-eight thousand, seven hundred eleven".