10940209 has 4 divisors (see below), whose sum is σ = 12503104. Its totient is φ = 9377316.

The previous prime is 10940201. The next prime is 10940213. The reversal of 10940209 is 90204901.

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: 90204901 = 463 ⋅194827.

It is a cyclic number.

It is not a de Polignac number, because 10940209 - 2³ = 10940201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10940201) 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, 781437 + ... + 781450.

It is an arithmetic number, because the mean of its divisors is an integer number (3125776).

Almost surely, 2^10940209 is an apocalyptic number.

It is an amenable number.

10940209 is a deficient number, since it is larger than the sum of its proper divisors (1562895).

10940209 is an equidigital number, since it uses as much as digits as its factorization.

10940209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1562894.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 10940209 is about 3307.5986757767. The cubic root of 10940209 is about 221.9943252614.

The spelling of 10940209 in words is "ten million, nine hundred forty thousand, two hundred nine".