123124377643 has 4 divisors (see below), whose sum is σ = 123125366680. Its totient is φ = 123123388608.

The previous prime is 123124377631. The next prime is 123124377647. The reversal of 123124377643 is 346773421321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 346773421321 = 29789 ⋅11640989.

It is a cyclic number.

It is not a de Polignac number, because 123124377643 - 2¹⁷ = 123124246571 is a prime.

It is a super-2 number, since 2×123124377643² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123124377643.

It is not an unprimeable number, because it can be changed into a prime (123124377647) 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, 275430 + ... + 567547.

It is an arithmetic number, because the mean of its divisors is an integer number (30781341670).

Almost surely, 2^123124377643 is an apocalyptic number.

123124377643 is a deficient number, since it is larger than the sum of its proper divisors (989037).

123124377643 is an equidigital number, since it uses as much as digits as its factorization.

123124377643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989036.

The product of its digits is 508032, while the sum is 43.

Adding to 123124377643 its reverse (346773421321), we get a palindrome (469897798964).

The spelling of 123124377643 in words is "one hundred twenty-three billion, one hundred twenty-four million, three hundred seventy-seven thousand, six hundred forty-three".