123991584767 has 4 divisors (see below), whose sum is σ = 123993755376. Its totient is φ = 123989414160.

The previous prime is 123991584751. The next prime is 123991584793. The reversal of 123991584767 is 767485199321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 767485199321 = 19 ⋅40393957859.

It is a cyclic number.

It is not a de Polignac number, because 123991584767 - 2⁴ = 123991584751 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 (123991584797) 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, 997238 + ... + 1114659.

It is an arithmetic number, because the mean of its divisors is an integer number (30998438844).

Almost surely, 2^123991584767 is an apocalyptic number.

123991584767 is a deficient number, since it is larger than the sum of its proper divisors (2170609).

123991584767 is an equidigital number, since it uses as much as digits as its factorization.

123991584767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170608.

The product of its digits is 22861440, while the sum is 62.

The spelling of 123991584767 in words is "one hundred twenty-three billion, nine hundred ninety-one million, five hundred eighty-four thousand, seven hundred sixty-seven".