123935018573 has 4 divisors (see below), whose sum is σ = 123938569020. Its totient is φ = 123931468128.

The previous prime is 123935018567. The next prime is 123935018609. The reversal of 123935018573 is 375810539321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 14232967204 + 109702051369 = 119302^2 + 331213^2 .

It is a cyclic number.

It is not a de Polignac number, because 123935018573 - 2²⁰ = 123933969997 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 (123935018503) 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, 1722338 + ... + 1792851.

It is an arithmetic number, because the mean of its divisors is an integer number (30984642255).

Almost surely, 2^123935018573 is an apocalyptic number.

It is an amenable number.

123935018573 is a deficient number, since it is larger than the sum of its proper divisors (3550447).

123935018573 is an equidigital number, since it uses as much as digits as its factorization.

123935018573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550446.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 123935018573 in words is "one hundred twenty-three billion, nine hundred thirty-five million, eighteen thousand, five hundred seventy-three".