209124492 has 12 divisors (see below), whose sum is σ = 487957176. Its totient is φ = 69708160.

The previous prime is 209124449. The next prime is 209124493. The reversal of 209124492 is 294421902.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (209124493) 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, 8713509 + ... + 8713532.

It is an arithmetic number, because the mean of its divisors is an integer number (40663098).

Almost surely, 2^209124492 is an apocalyptic number.

It is an amenable number.

209124492 is an abundant number, since it is smaller than the sum of its proper divisors (278832684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

209124492 is a wasteful number, since it uses less digits than its factorization.

209124492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17427048 (or 17427046 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 209124492 is about 14461.1372996732. The cubic root of 209124492 is about 593.5650206852.

The spelling of 209124492 in words is "two hundred nine million, one hundred twenty-four thousand, four hundred ninety-two".