123404971 has 4 divisors (see below), whose sum is σ = 123541344. Its totient is φ = 123268600.

The previous prime is 123404899. The next prime is 123404977. The reversal of 123404971 is 179404321.

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 123404971 - 2⁷ = 123404843 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123404977) 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, 66820 + ... + 68641.

It is an arithmetic number, because the mean of its divisors is an integer number (30885336).

Almost surely, 2^123404971 is an apocalyptic number.

123404971 is a deficient number, since it is larger than the sum of its proper divisors (136373).

123404971 is an equidigital number, since it uses as much as digits as its factorization.

123404971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136372.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 123404971 is about 11108.7790058134. The cubic root of 123404971 is about 497.8641842394.

The spelling of 123404971 in words is "one hundred twenty-three million, four hundred four thousand, nine hundred seventy-one".