11950209 has 6 divisors (see below), whose sum is σ = 17261426. Its totient is φ = 7966800.

The previous prime is 11950207. The next prime is 11950231. The reversal of 11950209 is 90205911.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10909809 + 1040400 = 3303^2 + 1020^2 .

It is not a de Polignac number, because 11950209 - 2¹ = 11950207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11950207) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 663892 + ... + 663909.

Almost surely, 2^11950209 is an apocalyptic number.

It is an amenable number.

11950209 is a deficient number, since it is larger than the sum of its proper divisors (5311217).

11950209 is a wasteful number, since it uses less digits than its factorization.

11950209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327807 (or 1327804 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 27.

The square root of 11950209 is about 3456.9074329522. The cubic root of 11950209 is about 228.6257625110.

The spelling of 11950209 in words is "eleven million, nine hundred fifty thousand, two hundred nine".