209119912 has 8 divisors (see below), whose sum is σ = 392099850. Its totient is φ = 104559952.

The previous prime is 209119877. The next prime is 209119913. The reversal of 209119912 is 219911902.

It can be written as a sum of positive squares in only one way, i.e., 111386916 + 97732996 = 10554^2 + 9886^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×209119912² = 87462275189775488, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (209119913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13069987 + ... + 13070002.

Almost surely, 2^209119912 is an apocalyptic number.

It is an amenable number.

209119912 is a deficient number, since it is larger than the sum of its proper divisors (182979938).

209119912 is a wasteful number, since it uses less digits than its factorization.

209119912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26139995 (or 26139991 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 34.

The square root of 209119912 is about 14460.9789433496. The cubic root of 209119912 is about 593.5606874646.

The spelling of 209119912 in words is "two hundred nine million, one hundred nineteen thousand, nine hundred twelve".