123985885 has 8 divisors (see below), whose sum is σ = 150317496. Its totient is φ = 98165760.

The previous prime is 123985877. The next prime is 123985889. The reversal of 123985885 is 588589321.

It can be written as a sum of positive squares in 4 ways, for example, as 1285956 + 122699929 = 1134^2 + 11077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123985885 - 2³ = 123985877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123985889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127336 + ... + 128305.

It is an arithmetic number, because the mean of its divisors is an integer number (18789687).

Almost surely, 2^123985885 is an apocalyptic number.

It is an amenable number.

123985885 is a deficient number, since it is larger than the sum of its proper divisors (26331611).

123985885 is an equidigital number, since it uses as much as digits as its factorization.

123985885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255743.

The product of its digits is 691200, while the sum is 49.

The square root of 123985885 is about 11134.8949254135. The cubic root of 123985885 is about 498.6441734586.

The spelling of 123985885 in words is "one hundred twenty-three million, nine hundred eighty-five thousand, eight hundred eighty-five".