239209133 has 4 divisors (see below), whose sum is σ = 239422140. Its totient is φ = 238996128.

The previous prime is 239209099. The next prime is 239209163. The reversal of 239209133 is 331902932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 39778249 + 199430884 = 6307^2 + 14122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239209133 is a prime.

It is a super-2 number, since 2×239209133² = 114442018621223378, which contains 22 as substring.

It is a cake number, because a cake can be divided into 239209133 parts by 1128 planar cuts.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 239209133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239209163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104810 + ... + 107067.

It is an arithmetic number, because the mean of its divisors is an integer number (59855535).

Almost surely, 2^239209133 is an apocalyptic number.

It is an amenable number.

239209133 is a deficient number, since it is larger than the sum of its proper divisors (213007).

239209133 is a wasteful number, since it uses less digits than its factorization.

239209133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213006.

The product of its (nonzero) digits is 8748, while the sum is 32.

The square root of 239209133 is about 15466.3871993430. The cubic root of 239209133 is about 620.7631367785.

The spelling of 239209133 in words is "two hundred thirty-nine million, two hundred nine thousand, one hundred thirty-three".