82276981 has 4 divisors (see below), whose sum is σ = 82298700. Its totient is φ = 82255264.

The previous prime is 82276979. The next prime is 82276993. The reversal of 82276981 is 18967228.

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 23677956 + 58599025 = 4866^2 + 7655^2 .

It is a cyclic number.

It is not a de Polignac number, because 82276981 - 2¹ = 82276979 is a prime.

It is a super-2 number, since 2×82276981² = 13539003204948722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82276951) 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, 3526 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (20574675).

Almost surely, 2^82276981 is an apocalyptic number.

It is an amenable number.

82276981 is a deficient number, since it is larger than the sum of its proper divisors (21719).

82276981 is a wasteful number, since it uses less digits than its factorization.

82276981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21718.

The product of its digits is 96768, while the sum is 43.

The square root of 82276981 is about 9070.6659623205. The cubic root of 82276981 is about 434.9367609659.

The spelling of 82276981 in words is "eighty-two million, two hundred seventy-six thousand, nine hundred eighty-one".