82550789 has 2 divisors, whose sum is σ = 82550790. Its totient is φ = 82550788.

The previous prime is 82550779. The next prime is 82550803. The reversal of 82550789 is 98705528.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42797764 + 39753025 = 6542^2 + 6305^2 .

It is a cyclic number.

It is not a de Polignac number, because 82550789 - 2¹⁶ = 82485253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82550779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41275394 + 41275395.

It is an arithmetic number, because the mean of its divisors is an integer number (41275395).

Almost surely, 2^82550789 is an apocalyptic number.

It is an amenable number.

82550789 is a deficient number, since it is larger than the sum of its proper divisors (1).

82550789 is an equidigital number, since it uses as much as digits as its factorization.

82550789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 201600, while the sum is 44.

The square root of 82550789 is about 9085.7464745611. The cubic root of 82550789 is about 435.4186993406.

The spelling of 82550789 in words is "eighty-two million, five hundred fifty thousand, seven hundred eighty-nine".