123821834 has 16 divisors (see below), whose sum is σ = 194261760. Its totient is φ = 59080560.

The previous prime is 123821813. The next prime is 123821849. The reversal of 123821834 is 438128321.

It is a self number, because there is not a number n which added to its sum of digits gives 123821834.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18287 + ... + 24125.

It is an arithmetic number, because the mean of its divisors is an integer number (12141360).

Almost surely, 2^123821834 is an apocalyptic number.

123821834 is a deficient number, since it is larger than the sum of its proper divisors (70439926).

123821834 is a wasteful number, since it uses less digits than its factorization.

123821834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6325.

The product of its digits is 9216, while the sum is 32.

The square root of 123821834 is about 11127.5259604280. The cubic root of 123821834 is about 498.4241506152.

The spelling of 123821834 in words is "one hundred twenty-three million, eight hundred twenty-one thousand, eight hundred thirty-four".