82120906 has 8 divisors (see below), whose sum is σ = 140778720. Its totient is φ = 35194668.

The previous prime is 82120847. The next prime is 82120939. The reversal of 82120906 is 60902128.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2932876 + ... + 2932903.

It is an arithmetic number, because the mean of its divisors is an integer number (17597340).

Almost surely, 2^82120906 is an apocalyptic number.

82120906 is a deficient number, since it is larger than the sum of its proper divisors (58657814).

82120906 is a wasteful number, since it uses less digits than its factorization.

82120906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5865788.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 82120906 is about 9062.0585961469. The cubic root of 82120906 is about 434.6615696842.

The spelling of 82120906 in words is "eighty-two million, one hundred twenty thousand, nine hundred six".