123145419773 has 4 divisors (see below), whose sum is σ = 123147606720. Its totient is φ = 123143232828.

The previous prime is 123145419751. The next prime is 123145419809. The reversal of 123145419773 is 377914541321.

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, and also an emirpimes, since its reverse is a distinct semiprime: 377914541321 = 9803 ⋅38550907.

It is a cyclic number.

It is not a de Polignac number, because 123145419773 - 2⁸ = 123145419517 is a prime.

It is a super-2 number, since 2×123145419773² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123145419703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1006715 + ... + 1122392.

It is an arithmetic number, because the mean of its divisors is an integer number (30786901680).

Almost surely, 2^123145419773 is an apocalyptic number.

It is an amenable number.

123145419773 is a deficient number, since it is larger than the sum of its proper divisors (2186947).

123145419773 is an equidigital number, since it uses as much as digits as its factorization.

123145419773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186946.

The product of its digits is 635040, while the sum is 47.

The spelling of 123145419773 in words is "one hundred twenty-three billion, one hundred forty-five million, four hundred nineteen thousand, seven hundred seventy-three".