82126819 has 2 divisors, whose sum is σ = 82126820. Its totient is φ = 82126818.

The previous prime is 82126817. The next prime is 82126829. The reversal of 82126819 is 91862128.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82126819 - 2¹ = 82126817 is a prime.

It is a super-2 number, since 2×82126819² = 13489628798117522, which contains 22 as substring.

Together with 82126817, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (82126817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41063409 + 41063410.

It is an arithmetic number, because the mean of its divisors is an integer number (41063410).

Almost surely, 2^82126819 is an apocalyptic number.

82126819 is a deficient number, since it is larger than the sum of its proper divisors (1).

82126819 is an equidigital number, since it uses as much as digits as its factorization.

82126819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 37.

The square root of 82126819 is about 9062.3848406476. The cubic root of 82126819 is about 434.6720018316.

The spelling of 82126819 in words is "eighty-two million, one hundred twenty-six thousand, eight hundred nineteen".