39899893 has 4 divisors (see below), whose sum is σ = 43527168. Its totient is φ = 36272620.

The previous prime is 39899813. The next prime is 39899903.

39899893 is nontrivially palindromic in base 10.

39899893 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 39899893 - 2²¹ = 37802741 is a prime.

It is a super-2 number, since 2×39899893² = 3184002922822898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39899803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1813621 + ... + 1813642.

It is an arithmetic number, because the mean of its divisors is an integer number (10881792).

Almost surely, 2^39899893 is an apocalyptic number.

It is an amenable number.

39899893 is a deficient number, since it is larger than the sum of its proper divisors (3627275).

39899893 is a wasteful number, since it uses less digits than its factorization.

39899893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3627274.

The product of its digits is 3779136, while the sum is 58.

The square root of 39899893 is about 6316.6362092494. The cubic root of 39899893 is about 341.7096500619.

The spelling of 39899893 in words is "thirty-nine million, eight hundred ninety-nine thousand, eight hundred ninety-three".