209798043 has 16 divisors (see below), whose sum is σ = 344284416. Its totient is φ = 110662560.

The previous prime is 209798033. The next prime is 209798051. The reversal of 209798043 is 340897902.

It is not a de Polignac number, because 209798043 - 2⁴ = 209798027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209797986 and 209798004.

It is not an unprimeable number, because it can be changed into a prime (209798023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 383973 + ... + 384518.

It is an arithmetic number, because the mean of its divisors is an integer number (21517776).

Almost surely, 2^209798043 is an apocalyptic number.

209798043 is a deficient number, since it is larger than the sum of its proper divisors (134486373).

209798043 is a wasteful number, since it uses less digits than its factorization.

209798043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768514.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 209798043 is about 14484.4068915507. The cubic root of 209798043 is about 594.2015918374.

The spelling of 209798043 in words is "two hundred nine million, seven hundred ninety-eight thousand, forty-three".