982745821 has 4 divisors (see below), whose sum is σ = 982819552. Its totient is φ = 982672092.

The previous prime is 982745791. The next prime is 982745917. The reversal of 982745821 is 128547289.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 982745821 - 2¹⁷ = 982614749 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 (982745021) 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, 10665 + ... + 45598.

It is an arithmetic number, because the mean of its divisors is an integer number (245704888).

Almost surely, 2^982745821 is an apocalyptic number.

It is an amenable number.

982745821 is a deficient number, since it is larger than the sum of its proper divisors (73731).

982745821 is a wasteful number, since it uses less digits than its factorization.

982745821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73730.

The product of its digits is 322560, while the sum is 46.

The square root of 982745821 is about 31348.7770255875. Note that the first 3 decimals coincide. The cubic root of 982745821 is about 994.2152077052.

The spelling of 982745821 in words is "nine hundred eighty-two million, seven hundred forty-five thousand, eight hundred twenty-one".