82739989 has 2 divisors, whose sum is σ = 82739990. Its totient is φ = 82739988.

The previous prime is 82739981. The next prime is 82740001. The reversal of 82739989 is 98993728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81595089 + 1144900 = 9033^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 82739989 - 2³ = 82739981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82739981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41369994 + 41369995.

It is an arithmetic number, because the mean of its divisors is an integer number (41369995).

Almost surely, 2^82739989 is an apocalyptic number.

It is an amenable number.

82739989 is a deficient number, since it is larger than the sum of its proper divisors (1).

82739989 is an equidigital number, since it uses as much as digits as its factorization.

82739989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 82739989 is about 9096.1524283622. The cubic root of 82739989 is about 435.7510941479.

The spelling of 82739989 in words is "eighty-two million, seven hundred thirty-nine thousand, nine hundred eighty-nine".