945821293831 has 4 divisors (see below), whose sum is σ = 946894871664. Its totient is φ = 944747716000.

The previous prime is 945821293829. The next prime is 945821293853. The reversal of 945821293831 is 138392128549.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138392128549 = 6287 ⋅22012427.

It is a cyclic number.

It is not a de Polignac number, because 945821293831 - 2¹ = 945821293829 is a prime.

It is a super-2 number, since 2×945821293831² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (945821293801) 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, 536787595 + ... + 536789356.

It is an arithmetic number, because the mean of its divisors is an integer number (236723717916).

Almost surely, 2^945821293831 is an apocalyptic number.

945821293831 is a deficient number, since it is larger than the sum of its proper divisors (1073577833).

945821293831 is a wasteful number, since it uses less digits than its factorization.

945821293831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073577832.

The product of its digits is 3732480, while the sum is 55.

The spelling of 945821293831 in words is "nine hundred forty-five billion, eight hundred twenty-one million, two hundred ninety-three thousand, eight hundred thirty-one".