10209947 has 4 divisors (see below), whose sum is σ = 11138136. Its totient is φ = 9281760.

The previous prime is 10209931. The next prime is 10209961. The reversal of 10209947 is 74990201.

10209947 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 10209947 - 2⁴ = 10209931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10209047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464078 + ... + 464099.

It is an arithmetic number, because the mean of its divisors is an integer number (2784534).

Almost surely, 2^10209947 is an apocalyptic number.

10209947 is a deficient number, since it is larger than the sum of its proper divisors (928189).

10209947 is an equidigital number, since it uses as much as digits as its factorization.

10209947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928188.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 10209947 is about 3195.3007683159. The cubic root of 10209947 is about 216.9407626396.

The spelling of 10209947 in words is "ten million, two hundred nine thousand, nine hundred forty-seven".