82725889 has 2 divisors, whose sum is σ = 82725890. Its totient is φ = 82725888.

The previous prime is 82725857. The next prime is 82725941. The reversal of 82725889 is 98852728.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51365889 + 31360000 = 7167^2 + 5600^2 .

It is a cyclic number.

It is not a de Polignac number, because 82725889 - 2⁵ = 82725857 is a prime.

It is not a weakly prime, because it can be changed into another prime (82725809) 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, 41362944 + 41362945.

It is an arithmetic number, because the mean of its divisors is an integer number (41362945).

Almost surely, 2^82725889 is an apocalyptic number.

It is an amenable number.

82725889 is a deficient number, since it is larger than the sum of its proper divisors (1).

82725889 is an equidigital number, since it uses as much as digits as its factorization.

82725889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 645120, while the sum is 49.

The square root of 82725889 is about 9095.3773423646. The cubic root of 82725889 is about 435.7263401382.

It can be divided in two parts, 8272 and 5889, that added together give a square (14161 = 119²).

The spelling of 82725889 in words is "eighty-two million, seven hundred twenty-five thousand, eight hundred eighty-nine".