239814857 has 2 divisors, whose sum is σ = 239814858. Its totient is φ = 239814856.

The previous prime is 239814829. The next prime is 239814901. The reversal of 239814857 is 758418932.

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., 223323136 + 16491721 = 14944^2 + 4061^2 .

It is a cyclic number.

It is not a de Polignac number, because 239814857 - 2¹⁸ = 239552713 is a prime.

It is a super-2 number, since 2×239814857² = 115022331275860898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (439814857) 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, 119907428 + 119907429.

It is an arithmetic number, because the mean of its divisors is an integer number (119907429).

Almost surely, 2^239814857 is an apocalyptic number.

It is an amenable number.

239814857 is a deficient number, since it is larger than the sum of its proper divisors (1).

239814857 is an equidigital number, since it uses as much as digits as its factorization.

239814857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 239814857 is about 15485.9567673425. The cubic root of 239814857 is about 621.2866594293.

The spelling of 239814857 in words is "two hundred thirty-nine million, eight hundred fourteen thousand, eight hundred fifty-seven".