39850513 has 4 divisors (see below), whose sum is σ = 41583168. Its totient is φ = 38117860.

The previous prime is 39850493. The next prime is 39850529. The reversal of 39850513 is 31505893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31505893 = 131 ⋅240503.

It is a cyclic number.

It is not a de Polignac number, because 39850513 - 2¹³ = 39842321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (39850913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 866293 + ... + 866338.

It is an arithmetic number, because the mean of its divisors is an integer number (10395792).

Almost surely, 2^39850513 is an apocalyptic number.

It is an amenable number.

39850513 is a deficient number, since it is larger than the sum of its proper divisors (1732655).

39850513 is a wasteful number, since it uses less digits than its factorization.

39850513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1732654.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 39850513 is about 6312.7262731723. The cubic root of 39850513 is about 341.5686255548.

The spelling of 39850513 in words is "thirty-nine million, eight hundred fifty thousand, five hundred thirteen".