123284857 has 2 divisors, whose sum is σ = 123284858. Its totient is φ = 123284856.

The previous prime is 123284849. The next prime is 123284873. The reversal of 123284857 is 758482321.

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., 123010281 + 274576 = 11091^2 + 524^2 .

It is an emirp because it is prime and its reverse (758482321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 123284857 - 2³ = 123284849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (123284257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61642428 + 61642429.

It is an arithmetic number, because the mean of its divisors is an integer number (61642429).

Almost surely, 2^123284857 is an apocalyptic number.

It is an amenable number.

123284857 is a deficient number, since it is larger than the sum of its proper divisors (1).

123284857 is an equidigital number, since it uses as much as digits as its factorization.

123284857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 40.

The square root of 123284857 is about 11103.3714249322. The cubic root of 123284857 is about 497.7026027662.

The spelling of 123284857 in words is "one hundred twenty-three million, two hundred eighty-four thousand, eight hundred fifty-seven".