123828691 has 16 divisors (see below), whose sum is σ = 147907584. Its totient is φ = 101453184.

The previous prime is 123828671. The next prime is 123828701. The reversal of 123828691 is 196828321.

It is not a de Polignac number, because 123828691 - 2⁷ = 123828563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123828611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9771 + ... + 18523.

It is an arithmetic number, because the mean of its divisors is an integer number (9244224).

Almost surely, 2^123828691 is an apocalyptic number.

123828691 is a deficient number, since it is larger than the sum of its proper divisors (24078893).

123828691 is an equidigital number, since it uses as much as digits as its factorization.

123828691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8850.

The product of its digits is 41472, while the sum is 40.

The square root of 123828691 is about 11127.8340659807. The cubic root of 123828691 is about 498.4333510155.

It can be divided in two parts, 1238 and 28691, that added together give a square (29929 = 173²).

The spelling of 123828691 in words is "one hundred twenty-three million, eight hundred twenty-eight thousand, six hundred ninety-one".