209995083 has 12 divisors (see below), whose sum is σ = 316514640. Its totient is φ = 133909776.

The previous prime is 209995081. The next prime is 209995099. The reversal of 209995083 is 380599902.

It is not a de Polignac number, because 209995083 - 2¹ = 209995081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (209995081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 507028 + ... + 507441.

It is an arithmetic number, because the mean of its divisors is an integer number (26376220).

Almost surely, 2^209995083 is an apocalyptic number.

209995083 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

209995083 is a deficient number, since it is larger than the sum of its proper divisors (106519557).

209995083 is a wasteful number, since it uses less digits than its factorization.

209995083 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014498 (or 1014495 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 209995083 is about 14491.2070925786. The cubic root of 209995083 is about 594.3875561505.

The spelling of 209995083 in words is "two hundred nine million, nine hundred ninety-five thousand, eighty-three".