945397189823 has 4 divisors (see below), whose sum is σ = 948991856208. Its totient is φ = 941802523440.

The previous prime is 945397189819. The next prime is 945397189859. The reversal of 945397189823 is 328981793549.

945397189823 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: 328981793549 = 24859 ⋅13233911.

It is a cyclic number.

It is not a de Polignac number, because 945397189823 - 2² = 945397189819 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 (945397189123) 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, 1797332798 + ... + 1797333323.

It is an arithmetic number, because the mean of its divisors is an integer number (237247964052).

Almost surely, 2^945397189823 is an apocalyptic number.

945397189823 is a deficient number, since it is larger than the sum of its proper divisors (3594666385).

945397189823 is a wasteful number, since it uses less digits than its factorization.

945397189823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3594666384.

The product of its digits is 117573120, while the sum is 68.

The spelling of 945397189823 in words is "nine hundred forty-five billion, three hundred ninety-seven million, one hundred eighty-nine thousand, eight hundred twenty-three".