82353781 has 2 divisors, whose sum is σ = 82353782. Its totient is φ = 82353780.

The previous prime is 82353779. The next prime is 82353829. The reversal of 82353781 is 18735328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60310756 + 22043025 = 7766^2 + 4695^2 .

It is a cyclic number.

It is not a de Polignac number, because 82353781 - 2¹ = 82353779 is a prime.

It is a super-2 number, since 2×82353781² = 13564290489991922, which contains 22 as substring.

Together with 82353779, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 82353781.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82350781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41176890 + 41176891.

It is an arithmetic number, because the mean of its divisors is an integer number (41176891).

Almost surely, 2^82353781 is an apocalyptic number.

It is an amenable number.

82353781 is a deficient number, since it is larger than the sum of its proper divisors (1).

82353781 is an equidigital number, since it uses as much as digits as its factorization.

82353781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 82353781 is about 9074.8984016351. The cubic root of 82353781 is about 435.0720469031.

The spelling of 82353781 in words is "eighty-two million, three hundred fifty-three thousand, seven hundred eighty-one".