821084901373 has 4 divisors (see below), whose sum is σ = 895728983328. Its totient is φ = 746440819420.

The previous prime is 821084901353. The next prime is 821084901383. The reversal of 821084901373 is 373109480128.

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 a de Polignac number, because none of the positive numbers 2^k-821084901373 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 (821084901353) 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, 37322040961 + ... + 37322040982.

It is an arithmetic number, because the mean of its divisors is an integer number (223932245832).

Almost surely, 2^821084901373 is an apocalyptic number.

It is an amenable number.

821084901373 is a deficient number, since it is larger than the sum of its proper divisors (74644081955).

821084901373 is a wasteful number, since it uses less digits than its factorization.

821084901373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74644081954.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 821084901373 in words is "eight hundred twenty-one billion, eighty-four million, nine hundred one thousand, three hundred seventy-three".