82585961 has 4 divisors (see below), whose sum is σ = 84818052. Its totient is φ = 80353872.

The previous prime is 82585957. The next prime is 82585963. The reversal of 82585961 is 16958528.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 47004736 + 35581225 = 6856^2 + 5965^2 .

It is a cyclic number.

It is not a de Polignac number, because 82585961 - 2² = 82585957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82585963) 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 in 3 ways as a sum of consecutive naturals, for example, 1115990 + ... + 1116063.

It is an arithmetic number, because the mean of its divisors is an integer number (21204513).

Almost surely, 2^82585961 is an apocalyptic number.

It is an amenable number.

82585961 is a deficient number, since it is larger than the sum of its proper divisors (2232091).

82585961 is a wasteful number, since it uses less digits than its factorization.

82585961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232090.

The product of its digits is 172800, while the sum is 44.

The square root of 82585961 is about 9087.6818276170. The cubic root of 82585961 is about 435.4805294462.

The spelling of 82585961 in words is "eighty-two million, five hundred eighty-five thousand, nine hundred sixty-one".