842493083521 has 4 divisors (see below), whose sum is σ = 843795237312. Its totient is φ = 841190929732.

The previous prime is 842493083479. The next prime is 842493083561. The reversal of 842493083521 is 125380394248.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 842493083521 - 2²⁹ = 841956212609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842493083561) 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, 651075925 + ... + 651077218.

It is an arithmetic number, because the mean of its divisors is an integer number (210948809328).

Almost surely, 2^842493083521 is an apocalyptic number.

It is an amenable number.

842493083521 is a deficient number, since it is larger than the sum of its proper divisors (1302153791).

842493083521 is a wasteful number, since it uses less digits than its factorization.

842493083521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1302153790.

The product of its (nonzero) digits is 1658880, while the sum is 49.

The spelling of 842493083521 in words is "eight hundred forty-two billion, four hundred ninety-three million, eighty-three thousand, five hundred twenty-one".