39850913 has 2 divisors, whose sum is σ = 39850914. Its totient is φ = 39850912.

The previous prime is 39850891. The next prime is 39850939. The reversal of 39850913 is 31905893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29463184 + 10387729 = 5428^2 + 3223^2 .

It is an emirp because it is prime and its reverse (31905893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 39850913 - 2⁶ = 39850849 is a prime.

It is not a weakly prime, because it can be changed into another prime (39850963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19925456 + 19925457.

It is an arithmetic number, because the mean of its divisors is an integer number (19925457).

Almost surely, 2^39850913 is an apocalyptic number.

It is an amenable number.

39850913 is a deficient number, since it is larger than the sum of its proper divisors (1).

39850913 is an equidigital number, since it uses as much as digits as its factorization.

39850913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 39850913 is about 6312.7579551255. The cubic root of 39850913 is about 341.5697683840.

The spelling of 39850913 in words is "thirty-nine million, eight hundred fifty thousand, nine hundred thirteen".