82010989 has 2 divisors, whose sum is σ = 82010990. Its totient is φ = 82010988.

The previous prime is 82010963. The next prime is 82011001. The reversal of 82010989 is 98901028.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64722025 + 17288964 = 8045^2 + 4158^2 .

It is a cyclic number.

It is not a de Polignac number, because 82010989 - 2²⁵ = 48456557 is a prime.

82010989 is a modest number, since divided by 10989 gives 82 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82010959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41005494 + 41005495.

It is an arithmetic number, because the mean of its divisors is an integer number (41005495).

Almost surely, 2^82010989 is an apocalyptic number.

It is an amenable number.

82010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

82010989 is an equidigital number, since it uses as much as digits as its factorization.

82010989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 82010989 is about 9055.9918838303. The cubic root of 82010989 is about 434.4675548267.

The spelling of 82010989 in words is "eighty-two million, ten thousand, nine hundred eighty-nine".