209493010 has 8 divisors (see below), whose sum is σ = 377087436. Its totient is φ = 83797200.

The previous prime is 209493007. The next prime is 209493019. The reversal of 209493010 is 10394902.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 209467729 + 25281 = 14473^2 + 159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 209493010.

It is not an unprimeable number, because it can be changed into a prime (209493019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10474641 + ... + 10474660.

Almost surely, 2^209493010 is an apocalyptic number.

209493010 is a deficient number, since it is larger than the sum of its proper divisors (167594426).

209493010 is a wasteful number, since it uses less digits than its factorization.

209493010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20949308.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 209493010 is about 14473.8733585727. The cubic root of 209493010 is about 593.9134750607.

The spelling of 209493010 in words is "two hundred nine million, four hundred ninety-three thousand, ten".