123575375477 has 4 divisors (see below), whose sum is σ = 123576143820. Its totient is φ = 123574607136.

The previous prime is 123575375459. The next prime is 123575375503. The reversal of 123575375477 is 774573575321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 100844988721 + 22730386756 = 317561^2 + 150766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123575375477 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 (123575371477) 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, 40352 + ... + 498777.

It is an arithmetic number, because the mean of its divisors is an integer number (30894035955).

Almost surely, 2^123575375477 is an apocalyptic number.

It is an amenable number.

123575375477 is a deficient number, since it is larger than the sum of its proper divisors (768343).

123575375477 is an equidigital number, since it uses as much as digits as its factorization.

123575375477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768342.

The product of its digits is 21609000, while the sum is 56.

The spelling of 123575375477 in words is "one hundred twenty-three billion, five hundred seventy-five million, three hundred seventy-five thousand, four hundred seventy-seven".