39938807 has 2 divisors, whose sum is σ = 39938808. Its totient is φ = 39938806.

The previous prime is 39938803. The next prime is 39938827. The reversal of 39938807 is 70883993.

It is a weak prime.

It is an emirp because it is prime and its reverse (70883993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39938807 - 2² = 39938803 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39938803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19969403 + 19969404.

It is an arithmetic number, because the mean of its divisors is an integer number (19969404).

Almost surely, 2^39938807 is an apocalyptic number.

39938807 is a deficient number, since it is larger than the sum of its proper divisors (1).

39938807 is an equidigital number, since it uses as much as digits as its factorization.

39938807 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 39938807 is about 6319.7157372781. The cubic root of 39938807 is about 341.8207027302.

The spelling of 39938807 in words is "thirty-nine million, nine hundred thirty-eight thousand, eight hundred seven".