82118961 has 8 divisors (see below), whose sum is σ = 121657760. Its totient is φ = 54745956.

The previous prime is 82118929. The next prime is 82118963. The reversal of 82118961 is 16981128.

It is not a de Polignac number, because 82118961 - 2⁵ = 82118929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82118963) 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 in 7 ways as a sum of consecutive naturals, for example, 1520695 + ... + 1520748.

It is an arithmetic number, because the mean of its divisors is an integer number (15207220).

Almost surely, 2^82118961 is an apocalyptic number.

It is an amenable number.

82118961 is a deficient number, since it is larger than the sum of its proper divisors (39538799).

82118961 is a wasteful number, since it uses less digits than its factorization.

82118961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041452 (or 3041446 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 82118961 is about 9061.9512799397. The cubic root of 82118961 is about 434.6581380634.

The spelling of 82118961 in words is "eighty-two million, one hundred eighteen thousand, nine hundred sixty-one".