10209939 has 4 divisors (see below), whose sum is σ = 13613256. Its totient is φ = 6806624.

The previous prime is 10209931. The next prime is 10209961. The reversal of 10209939 is 93990201.

10209939 is digitally balanced in base 3, 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.

It is a cyclic number.

It is not a de Polignac number, because 10209939 - 2³ = 10209931 is a prime.

It is a super-3 number, since 3×10209939³ (a number of 22 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (10209931) 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, 1701654 + ... + 1701659.

It is an arithmetic number, because the mean of its divisors is an integer number (3403314).

Almost surely, 2^10209939 is an apocalyptic number.

10209939 is a deficient number, since it is larger than the sum of its proper divisors (3403317).

10209939 is an equidigital number, since it uses as much as digits as its factorization.

10209939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3403316.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 10209939 is about 3195.2995164773. The cubic root of 10209939 is about 216.9407059783.

The spelling of 10209939 in words is "ten million, two hundred nine thousand, nine hundred thirty-nine".