209312492 has 6 divisors (see below), whose sum is σ = 366296868. Its totient is φ = 104656244.

The previous prime is 209312491. The next prime is 209312513. The reversal of 209312492 is 294213902.

It is not an unprimeable number, because it can be changed into a prime (209312491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26164058 + ... + 26164065.

It is an arithmetic number, because the mean of its divisors is an integer number (61049478).

Almost surely, 2^209312492 is an apocalyptic number.

It is an amenable number.

209312492 is a deficient number, since it is larger than the sum of its proper divisors (156984376).

209312492 is a wasteful number, since it uses less digits than its factorization.

209312492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52328127 (or 52328125 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 209312492 is about 14467.6360197511. The cubic root of 209312492 is about 593.7428363014.

The spelling of 209312492 in words is "two hundred nine million, three hundred twelve thousand, four hundred ninety-two".