123447243671 has 4 divisors (see below), whose sum is σ = 123478763352. Its totient is φ = 123415723992.

The previous prime is 123447243641. The next prime is 123447243679. The reversal of 123447243671 is 176342744321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176342744321 = 61 ⋅2890864661.

It is a cyclic number.

It is not a de Polignac number, because 123447243671 - 2⁶ = 123447243607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123447243679) 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, 15753965 + ... + 15761798.

It is an arithmetic number, because the mean of its divisors is an integer number (30869690838).

Almost surely, 2^123447243671 is an apocalyptic number.

123447243671 is a deficient number, since it is larger than the sum of its proper divisors (31519681).

123447243671 is an equidigital number, since it uses as much as digits as its factorization.

123447243671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31519680.

The product of its digits is 677376, while the sum is 44.

Adding to 123447243671 its reverse (176342744321), we get a palindrome (299789987992).

The spelling of 123447243671 in words is "one hundred twenty-three billion, four hundred forty-seven million, two hundred forty-three thousand, six hundred seventy-one".