82883781 has 12 divisors (see below), whose sum is σ = 120415308. Its totient is φ = 54935424.

The previous prime is 82883777. The next prime is 82883803. The reversal of 82883781 is 18738828.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36180225 + 46703556 = 6015^2 + 6834^2 .

It is not a de Polignac number, because 82883781 - 2² = 82883777 is a prime.

It is a super-2 number, since 2×82883781² = 13739442305711922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82883741) 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 11 ways as a sum of consecutive naturals, for example, 25060 + ... + 28173.

It is an arithmetic number, because the mean of its divisors is an integer number (10034609).

Almost surely, 2^82883781 is an apocalyptic number.

It is an amenable number.

82883781 is a deficient number, since it is larger than the sum of its proper divisors (37531527).

82883781 is a wasteful number, since it uses less digits than its factorization.

82883781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53412 (or 53409 counting only the distinct ones).

The product of its digits is 172032, while the sum is 45.

The square root of 82883781 is about 9104.0529985276. The cubic root of 82883781 is about 436.0033754613.

The spelling of 82883781 in words is "eighty-two million, eight hundred eighty-three thousand, seven hundred eighty-one".