123665479043 has 4 divisors (see below), whose sum is σ = 123759237360. Its totient is φ = 123571720728.

The previous prime is 123665479033. The next prime is 123665479109. The reversal of 123665479043 is 340974566321.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123665479043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123665478982 and 123665479000.

It is not an unprimeable number, because it can be changed into a prime (123665479013) 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, 46877180 + ... + 46879817.

It is an arithmetic number, because the mean of its divisors is an integer number (30939809340).

Almost surely, 2^123665479043 is an apocalyptic number.

123665479043 is a deficient number, since it is larger than the sum of its proper divisors (93758317).

123665479043 is an equidigital number, since it uses as much as digits as its factorization.

123665479043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93758316.

The product of its (nonzero) digits is 3265920, while the sum is 50.

The spelling of 123665479043 in words is "one hundred twenty-three billion, six hundred sixty-five million, four hundred seventy-nine thousand, forty-three".