981682577 has 4 divisors (see below), whose sum is σ = 997775796. Its totient is φ = 965589360.

The previous prime is 981682547. The next prime is 981682579. The reversal of 981682577 is 775286189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 775286189 = 2539 ⋅305351.

It can be written as a sum of positive squares in 2 ways, for example, as 42627841 + 939054736 = 6529^2 + 30644^2 .

It is a cyclic number.

It is not a de Polignac number, because 981682577 - 2⁸ = 981682321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981682579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8046518 + ... + 8046639.

It is an arithmetic number, because the mean of its divisors is an integer number (249443949).

Almost surely, 2^981682577 is an apocalyptic number.

It is an amenable number.

981682577 is a deficient number, since it is larger than the sum of its proper divisors (16093219).

981682577 is a wasteful number, since it uses less digits than its factorization.

981682577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16093218.

The product of its digits is 1693440, while the sum is 53.

The square root of 981682577 is about 31331.8141351566. The cubic root of 981682577 is about 993.8565273668.

The spelling of 981682577 in words is "nine hundred eighty-one million, six hundred eighty-two thousand, five hundred seventy-seven".