982120081 has 4 divisors (see below), whose sum is σ = 984050100. Its totient is φ = 980190064.

The previous prime is 982120049. The next prime is 982120093. The reversal of 982120081 is 180021289.

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 866772481 + 115347600 = 29441^2 + 10740^2 .

It is a cyclic number.

It is not a de Polignac number, because 982120081 - 2⁵ = 982120049 is a prime.

It is a super-2 number, since 2×982120081² = 1929119707006893122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (982123081) 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, 964246 + ... + 965263.

It is an arithmetic number, because the mean of its divisors is an integer number (246012525).

Almost surely, 2^982120081 is an apocalyptic number.

It is an amenable number.

982120081 is a deficient number, since it is larger than the sum of its proper divisors (1930019).

982120081 is a wasteful number, since it uses less digits than its factorization.

982120081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1930018.

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 982120081 is about 31338.7951427620. The cubic root of 982120081 is about 994.0041486169.

The spelling of 982120081 in words is "nine hundred eighty-two million, one hundred twenty thousand, eighty-one".