123828931 has 4 divisors (see below), whose sum is σ = 125677192. Its totient is φ = 121980672.

The previous prime is 123828923. The next prime is 123828961. The reversal of 123828931 is 139828321.

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

It is a cyclic number.

It is not a de Polignac number, because 123828931 - 2³ = 123828923 is a prime.

It is a super-2 number, since 2×123828931² = 30667208305205522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123828961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 924030 + ... + 924163.

It is an arithmetic number, because the mean of its divisors is an integer number (31419298).

Almost surely, 2^123828931 is an apocalyptic number.

123828931 is a deficient number, since it is larger than the sum of its proper divisors (1848261).

123828931 is an equidigital number, since it uses as much as digits as its factorization.

123828931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1848260.

The product of its digits is 20736, while the sum is 37.

The square root of 123828931 is about 11127.8448497452. The cubic root of 123828931 is about 498.4336730300.

The spelling of 123828931 in words is "one hundred twenty-three million, eight hundred twenty-eight thousand, nine hundred thirty-one".