82379866 has 4 divisors (see below), whose sum is σ = 123569802. Its totient is φ = 41189932.

The previous prime is 82379863. The next prime is 82379893. The reversal of 82379866 is 66897328.

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

It can be written as a sum of positive squares in only one way, i.e., 47817225 + 34562641 = 6915^2 + 5879^2 .

It is not an unprimeable number, because it can be changed into a prime (82379863) 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, 20594965 + ... + 20594968.

Almost surely, 2^82379866 is an apocalyptic number.

82379866 is a deficient number, since it is larger than the sum of its proper divisors (41189936).

82379866 is a wasteful number, since it uses less digits than its factorization.

82379866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41189935.

The product of its digits is 870912, while the sum is 49.

The square root of 82379866 is about 9076.3354940196. The cubic root of 82379866 is about 435.1179774246.

The spelling of 82379866 in words is "eighty-two million, three hundred seventy-nine thousand, eight hundred sixty-six".