39139907 has 2 divisors, whose sum is σ = 39139908. Its totient is φ = 39139906.

The previous prime is 39139901. The next prime is 39139921. The reversal of 39139907 is 70993193.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39139907 - 2⁶ = 39139843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39139901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19569953 + 19569954.

It is an arithmetic number, because the mean of its divisors is an integer number (19569954).

Almost surely, 2^39139907 is an apocalyptic number.

39139907 is a deficient number, since it is larger than the sum of its proper divisors (1).

39139907 is an equidigital number, since it uses as much as digits as its factorization.

39139907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 41.

The square root of 39139907 is about 6256.1894952119. The cubic root of 39139907 is about 339.5261767813.

The spelling of 39139907 in words is "thirty-nine million, one hundred thirty-nine thousand, nine hundred seven".