209798042 has 16 divisors (see below), whose sum is σ = 333009792. Its totient is φ = 98923440.

The previous prime is 209798033. The next prime is 209798051. The reversal of 209798042 is 240897902.

It is an interprime number because it is at equal distance from previous prime (209798033) and next prime (209798051).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 28853 + ... + 35384.

It is an arithmetic number, because the mean of its divisors is an integer number (20813112).

Almost surely, 2^209798042 is an apocalyptic number.

209798042 is a deficient number, since it is larger than the sum of its proper divisors (123211750).

209798042 is a wasteful number, since it uses less digits than its factorization.

209798042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64333.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 209798042 is about 14484.4068570308. The cubic root of 209798042 is about 594.2015908933.

The spelling of 209798042 in words is "two hundred nine million, seven hundred ninety-eight thousand, forty-two".