38909807 has 2 divisors, whose sum is σ = 38909808. Its totient is φ = 38909806.

The previous prime is 38909771. The next prime is 38909809. The reversal of 38909807 is 70890983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38909807 - 2⁸ = 38909551 is a prime.

Together with 38909809, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (38909809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19454903 + 19454904.

It is an arithmetic number, because the mean of its divisors is an integer number (19454904).

Almost surely, 2^38909807 is an apocalyptic number.

38909807 is a deficient number, since it is larger than the sum of its proper divisors (1).

38909807 is an equidigital number, since it uses as much as digits as its factorization.

38909807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 38909807 is about 6237.7725992537. The cubic root of 38909807 is about 338.8595206935.

The spelling of 38909807 in words is "thirty-eight million, nine hundred nine thousand, eight hundred seven".