239017945 has 4 divisors (see below), whose sum is σ = 286821540. Its totient is φ = 191214352.

The previous prime is 239017931. The next prime is 239017949. The reversal of 239017945 is 549710932.

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 69705801 + 169312144 = 8349^2 + 13012^2 .

It is a cyclic number.

It is not a de Polignac number, because 239017945 - 2¹³ = 239009753 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 239017898 and 239017907.

It is not an unprimeable number, because it can be changed into a prime (239017949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23901790 + ... + 23901799.

It is an arithmetic number, because the mean of its divisors is an integer number (71705385).

Almost surely, 2^239017945 is an apocalyptic number.

It is an amenable number.

239017945 is a deficient number, since it is larger than the sum of its proper divisors (47803595).

239017945 is an equidigital number, since it uses as much as digits as its factorization.

239017945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47803594.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 239017945 is about 15460.2052056239. The cubic root of 239017945 is about 620.5977109659.

The spelling of 239017945 in words is "two hundred thirty-nine million, seventeen thousand, nine hundred forty-five".