862892047921 has 4 divisors (see below), whose sum is σ = 862982687844. Its totient is φ = 862801408000.

The previous prime is 862892047909. The next prime is 862892047931. The reversal of 862892047921 is 129740298268.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 717815617600 + 145076430321 = 847240^2 + 380889^2 .

It is a 3-Lehmer number, since φ(862892047921) divides (862892047921-1)³.

It is a cyclic number.

It is not a de Polignac number, because 862892047921 - 2²⁵ = 862858493489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (862892047931) by changing a digit.

It is a nontrivial repunit in base 9520.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45305680 + ... + 45324721.

It is an arithmetic number, because the mean of its divisors is an integer number (215745671961).

Almost surely, 2^862892047921 is an apocalyptic number.

It is an amenable number.

862892047921 is a deficient number, since it is larger than the sum of its proper divisors (90639923).

862892047921 is an equidigital number, since it uses as much as digits as its factorization.

862892047921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90639922.

The product of its (nonzero) digits is 6967296, while the sum is 58.

The spelling of 862892047921 in words is "eight hundred sixty-two billion, eight hundred ninety-two million, forty-seven thousand, nine hundred twenty-one".