3123197845 has 4 divisors (see below), whose sum is σ = 3747837420. Its totient is φ = 2498558272.

The previous prime is 3123197821. The next prime is 3123197873. The reversal of 3123197845 is 5487913213.

3123197845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5487913213 = 31541 ⋅173993.

It can be written as a sum of positive squares in 2 ways, for example, as 489250161 + 2633947684 = 22119^2 + 51322^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123197845 - 2⁵ = 3123197813 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312319780 + ... + 312319789.

It is an arithmetic number, because the mean of its divisors is an integer number (936959355).

Almost surely, 2^3123197845 is an apocalyptic number.

It is an amenable number.

3123197845 is a deficient number, since it is larger than the sum of its proper divisors (624639575).

3123197845 is an equidigital number, since it uses as much as digits as its factorization.

3123197845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624639574.

The product of its digits is 181440, while the sum is 43.

The square root of 3123197845 is about 55885.5781485707. The cubic root of 3123197845 is about 1461.7277732945.

The spelling of 3123197845 in words is "three billion, one hundred twenty-three million, one hundred ninety-seven thousand, eight hundred forty-five".