123698885 has 16 divisors (see below), whose sum is σ = 157431600. Its totient is φ = 92983296.

The previous prime is 123698867. The next prime is 123698909. The reversal of 123698885 is 588896321.

It is a Cunningham number, because it is equal to 11122²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 123698884 = 1^2 + 11122^2 .

It is a cyclic number.

It is not a de Polignac number, because 123698885 - 2⁶ = 123698821 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95321 + ... + 96609.

It is an arithmetic number, because the mean of its divisors is an integer number (9839475).

Almost surely, 2^123698885 is an apocalyptic number.

It is an amenable number.

123698885 is a deficient number, since it is larger than the sum of its proper divisors (33732715).

123698885 is a wasteful number, since it uses less digits than its factorization.

123698885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2440.

The product of its digits is 829440, while the sum is 50.

The square root of 123698885 is about 11122.0000449559. Note that the first 4 decimals coincide. The cubic root of 123698885 is about 498.2591257483.

The spelling of 123698885 in words is "one hundred twenty-three million, six hundred ninety-eight thousand, eight hundred eighty-five".