82070709 has 32 divisors (see below), whose sum is σ = 132986880. Its totient is φ = 43975872.

The previous prime is 82070707. The next prime is 82070717. The reversal of 82070709 is 90707028.

It is not a de Polignac number, because 82070709 - 2¹ = 82070707 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82070709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82070707) 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 31 ways as a sum of consecutive naturals, for example, 40099 + ... + 42095.

It is an arithmetic number, because the mean of its divisors is an integer number (4155840).

Almost surely, 2^82070709 is an apocalyptic number.

It is an amenable number.

82070709 is a deficient number, since it is larger than the sum of its proper divisors (50916171).

82070709 is a wasteful number, since it uses less digits than its factorization.

82070709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 82070709 is about 9059.2885482250. The cubic root of 82070709 is about 434.5729882864.

The spelling of 82070709 in words is "eighty-two million, seventy thousand, seven hundred nine".