82620709 has 8 divisors (see below), whose sum is σ = 84280320. Its totient is φ = 80969856.

The previous prime is 82620653. The next prime is 82620719. The reversal of 82620709 is 90702628.

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

It is a cyclic number.

It is not a de Polignac number, because 82620709 - 2¹¹ = 82618661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82620719) 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 7 ways as a sum of consecutive naturals, for example, 18844 + ... + 22810.

It is an arithmetic number, because the mean of its divisors is an integer number (10535040).

Almost surely, 2^82620709 is an apocalyptic number.

It is an amenable number.

82620709 is a deficient number, since it is larger than the sum of its proper divisors (1659611).

82620709 is a wasteful number, since it uses less digits than its factorization.

82620709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4379.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 82620709 is about 9089.5934452538. The cubic root of 82620709 is about 435.5415969508.

The spelling of 82620709 in words is "eighty-two million, six hundred twenty thousand, seven hundred nine".