921272339567 has 4 divisors (see below), whose sum is σ = 921616485816. Its totient is φ = 920928193320.

The previous prime is 921272339543. The next prime is 921272339573. The reversal of 921272339567 is 765933272129.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 921272339567 - 2¹⁰ = 921272338543 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 (921272339527) 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, 172069109 + ... + 172074462.

It is an arithmetic number, because the mean of its divisors is an integer number (230404121454).

Almost surely, 2^921272339567 is an apocalyptic number.

921272339567 is a deficient number, since it is larger than the sum of its proper divisors (344146249).

921272339567 is a wasteful number, since it uses less digits than its factorization.

921272339567 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344146248.

The product of its digits is 8573040, while the sum is 56.

The spelling of 921272339567 in words is "nine hundred twenty-one billion, two hundred seventy-two million, three hundred thirty-nine thousand, five hundred sixty-seven".