123117152477 has 4 divisors (see below), whose sum is σ = 134309620896. Its totient is φ = 111924684060.

The previous prime is 123117152467. The next prime is 123117152491. The reversal of 123117152477 is 774251711321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123117152477 - 2¹⁰ = 123117151453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123117152447) 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, 5596234193 + ... + 5596234214.

It is an arithmetic number, because the mean of its divisors is an integer number (33577405224).

Almost surely, 2^123117152477 is an apocalyptic number.

It is an amenable number.

123117152477 is a deficient number, since it is larger than the sum of its proper divisors (11192468419).

123117152477 is a wasteful number, since it uses less digits than its factorization.

123117152477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11192468418.

The product of its digits is 82320, while the sum is 41.

Adding to 123117152477 its reverse (774251711321), we get a palindrome (897368863798).

The spelling of 123117152477 in words is "one hundred twenty-three billion, one hundred seventeen million, one hundred fifty-two thousand, four hundred seventy-seven".