123438291 has 8 divisors (see below), whose sum is σ = 164875920. Its totient is φ = 82146432.

The previous prime is 123438281. The next prime is 123438299. The reversal of 123438291 is 192834321.

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

It is not a de Polignac number, because 123438291 - 2⁷ = 123438163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123438299) 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, 34450 + ... + 37863.

It is an arithmetic number, because the mean of its divisors is an integer number (20609490).

Almost surely, 2^123438291 is an apocalyptic number.

123438291 is a deficient number, since it is larger than the sum of its proper divisors (41437629).

123438291 is an equidigital number, since it uses as much as digits as its factorization.

123438291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72885.

The product of its digits is 10368, while the sum is 33.

The square root of 123438291 is about 11110.2786193686. The cubic root of 123438291 is about 497.9089888683.

The spelling of 123438291 in words is "one hundred twenty-three million, four hundred thirty-eight thousand, two hundred ninety-one".