123423633677 has 4 divisors (see below), whose sum is σ = 125446971996. Its totient is φ = 121400295360.

The previous prime is 123423633659. The next prime is 123423633721. The reversal of 123423633677 is 776336324321.

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 40213885156 + 83209748521 = 200534^2 + 288461^2 .

It is a cyclic number.

It is not a de Polignac number, because 123423633677 - 2¹⁴ = 123423617293 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 (123423633617) 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, 1011669068 + ... + 1011669189.

It is an arithmetic number, because the mean of its divisors is an integer number (31361742999).

Almost surely, 2^123423633677 is an apocalyptic number.

It is an amenable number.

123423633677 is a deficient number, since it is larger than the sum of its proper divisors (2023338319).

123423633677 is an equidigital number, since it uses as much as digits as its factorization.

123423633677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2023338318.

The product of its digits is 2286144, while the sum is 47.

Adding to 123423633677 its reverse (776336324321), we get a palindrome (899759957998).

The spelling of 123423633677 in words is "one hundred twenty-three billion, four hundred twenty-three million, six hundred thirty-three thousand, six hundred seventy-seven".