239684545 has 4 divisors (see below), whose sum is σ = 287621460. Its totient is φ = 191747632.

The previous prime is 239684539. The next prime is 239684567. The reversal of 239684545 is 545486932.

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 32353344 + 207331201 = 5688^2 + 14399^2 .

It is a cyclic number.

It is not a de Polignac number, because 239684545 - 2¹⁵ = 239651777 is a prime.

It is a super-2 number, since 2×239684545² = 114897362223714050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 239684495 and 239684504.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23968450 + ... + 23968459.

It is an arithmetic number, because the mean of its divisors is an integer number (71905365).

Almost surely, 2^239684545 is an apocalyptic number.

It is an amenable number.

239684545 is a deficient number, since it is larger than the sum of its proper divisors (47936915).

239684545 is an equidigital number, since it uses as much as digits as its factorization.

239684545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47936914.

The product of its digits is 1036800, while the sum is 46.

The square root of 239684545 is about 15481.7487707300. The cubic root of 239684545 is about 621.1741062470.

The spelling of 239684545 in words is "two hundred thirty-nine million, six hundred eighty-four thousand, five hundred forty-five".