82621843 has 2 divisors, whose sum is σ = 82621844. Its totient is φ = 82621842.

The previous prime is 82621829. The next prime is 82621879. The reversal of 82621843 is 34812628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82621843 - 2⁵ = 82621811 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 82621799 and 82621808.

It is not a weakly prime, because it can be changed into another prime (82621813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41310921 + 41310922.

It is an arithmetic number, because the mean of its divisors is an integer number (41310922).

Almost surely, 2^82621843 is an apocalyptic number.

82621843 is a deficient number, since it is larger than the sum of its proper divisors (1).

82621843 is an equidigital number, since it uses as much as digits as its factorization.

82621843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 82621843 is about 9089.6558240673. The cubic root of 82621843 is about 435.5435895986.

It can be divided in two parts, 82621 and 843, that multiplied together give a triangular number (69649503 = T₁₁₈₀₂).

The spelling of 82621843 in words is "eighty-two million, six hundred twenty-one thousand, eight hundred forty-three".