239045861 has 2 divisors, whose sum is σ = 239045862. Its totient is φ = 239045860.

The previous prime is 239045843. The next prime is 239045881. The reversal of 239045861 is 168540932.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212984836 + 26061025 = 14594^2 + 5105^2 .

It is a cyclic number.

It is not a de Polignac number, because 239045861 - 2⁶ = 239045797 is a prime.

It is a super-2 number, since 2×239045861² = 114285847322462642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239045801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119522930 + 119522931.

It is an arithmetic number, because the mean of its divisors is an integer number (119522931).

Almost surely, 2^239045861 is an apocalyptic number.

It is an amenable number.

239045861 is a deficient number, since it is larger than the sum of its proper divisors (1).

239045861 is an equidigital number, since it uses as much as digits as its factorization.

239045861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 239045861 is about 15461.1080133346. The cubic root of 239045861 is about 620.6218708412.

The spelling of 239045861 in words is "two hundred thirty-nine million, forty-five thousand, eight hundred sixty-one".