209596045 has 4 divisors (see below), whose sum is σ = 251515260. Its totient is φ = 167676832.

The previous prime is 209596031. The next prime is 209596063. The reversal of 209596045 is 540695902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540695902 = 2 ⋅270347951.

It can be written as a sum of positive squares in 2 ways, for example, as 24472809 + 185123236 = 4947^2 + 13606^2 .

It is a cyclic number.

It is not a de Polignac number, because 209596045 - 2⁷ = 209595917 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 209595989 and 209596007.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20959600 + ... + 20959609.

It is an arithmetic number, because the mean of its divisors is an integer number (62878815).

Almost surely, 2^209596045 is an apocalyptic number.

It is an amenable number.

209596045 is a deficient number, since it is larger than the sum of its proper divisors (41919215).

209596045 is an equidigital number, since it uses as much as digits as its factorization.

209596045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41919214.

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 209596045 is about 14477.4322654261. The cubic root of 209596045 is about 594.0108273070.

The spelling of 209596045 in words is "two hundred nine million, five hundred ninety-six thousand, forty-five".