239566969 has 2 divisors, whose sum is σ = 239566970. Its totient is φ = 239566968.

The previous prime is 239566937. The next prime is 239567017. The reversal of 239566969 is 969665932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206066025 + 33500944 = 14355^2 + 5788^2 .

It is a cyclic number.

It is not a de Polignac number, because 239566969 - 2⁵ = 239566937 is a prime.

It is a super-2 number, since 2×239566969² = 114784665271693922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (239561969) by changing a digit.

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 as a sum of consecutive naturals, namely, 119783484 + 119783485.

It is an arithmetic number, because the mean of its divisors is an integer number (119783485).

Almost surely, 2^239566969 is an apocalyptic number.

It is an amenable number.

239566969 is a deficient number, since it is larger than the sum of its proper divisors (1).

239566969 is an equidigital number, since it uses as much as digits as its factorization.

239566969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4723920, while the sum is 55.

The square root of 239566969 is about 15477.9510594910. The cubic root of 239566969 is about 621.0725183977.

The spelling of 239566969 in words is "two hundred thirty-nine million, five hundred sixty-six thousand, nine hundred sixty-nine".