82821269 has 2 divisors, whose sum is σ = 82821270. Its totient is φ = 82821268.

The previous prime is 82821259. The next prime is 82821283. The reversal of 82821269 is 96212828.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56175025 + 26646244 = 7495^2 + 5162^2 .

It is a cyclic number.

It is not a de Polignac number, because 82821269 - 2⁴ = 82821253 is a prime.

It is a super-2 number, since 2×82821269² = 13718725197540722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82821239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41410634 + 41410635.

It is an arithmetic number, because the mean of its divisors is an integer number (41410635).

Almost surely, 2^82821269 is an apocalyptic number.

It is an amenable number.

82821269 is a deficient number, since it is larger than the sum of its proper divisors (1).

82821269 is an equidigital number, since it uses as much as digits as its factorization.

82821269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 82821269 is about 9100.6191547608. The cubic root of 82821269 is about 435.8937347987.

The spelling of 82821269 in words is "eighty-two million, eight hundred twenty-one thousand, two hundred sixty-nine".