123290866 has 4 divisors (see below), whose sum is σ = 184936302. Its totient is φ = 61645432.

The previous prime is 123290837. The next prime is 123290873. The reversal of 123290866 is 668092321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 104550625 + 18740241 = 10225^2 + 4329^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30822715 + ... + 30822718.

Almost surely, 2^123290866 is an apocalyptic number.

123290866 is a deficient number, since it is larger than the sum of its proper divisors (61645436).

123290866 is an equidigital number, since it uses as much as digits as its factorization.

123290866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61645435.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 123290866 is about 11103.6420151228. The cubic root of 123290866 is about 497.7106887724.

The spelling of 123290866 in words is "one hundred twenty-three million, two hundred ninety thousand, eight hundred sixty-six".