82726789 has 2 divisors, whose sum is σ = 82726790. Its totient is φ = 82726788.

The previous prime is 82726771. The next prime is 82726841. The reversal of 82726789 is 98762728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71537764 + 11189025 = 8458^2 + 3345^2 .

It is a cyclic number.

It is not a de Polignac number, because 82726789 - 2¹⁵ = 82694021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82723789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41363394 + 41363395.

It is an arithmetic number, because the mean of its divisors is an integer number (41363395).

Almost surely, 2^82726789 is an apocalyptic number.

It is an amenable number.

82726789 is a deficient number, since it is larger than the sum of its proper divisors (1).

82726789 is an equidigital number, since it uses as much as digits as its factorization.

82726789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 677376, while the sum is 49.

The square root of 82726789 is about 9095.4268179124. The cubic root of 82726789 is about 435.7279202654.

The spelling of 82726789 in words is "eighty-two million, seven hundred twenty-six thousand, seven hundred eighty-nine".