820706613 has 8 divisors (see below), whose sum is σ = 1096888800. Its totient is φ = 545831088.

The previous prime is 820706611. The next prime is 820706633. The reversal of 820706613 is 316607028.

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

It is not a de Polignac number, because 820706613 - 2¹ = 820706611 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820706611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325198 + ... + 327711.

It is an arithmetic number, because the mean of its divisors is an integer number (137111100).

Almost surely, 2^820706613 is an apocalyptic number.

It is an amenable number.

820706613 is a deficient number, since it is larger than the sum of its proper divisors (276182187).

820706613 is a wasteful number, since it uses less digits than its factorization.

820706613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653331.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 820706613 is about 28647.9774678772. The cubic root of 820706613 is about 936.2589399284.

The spelling of 820706613 in words is "eight hundred twenty million, seven hundred six thousand, six hundred thirteen".