820694345 has 16 divisors (see below), whose sum is σ = 1042493760. Its totient is φ = 619168704.

The previous prime is 820694333. The next prime is 820694351. The reversal of 820694345 is 543496028.

820694345 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 820694345 - 2¹⁸ = 820432201 is a prime.

It is a super-3 number, since 3×820694345³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59579 + ... + 72048.

It is an arithmetic number, because the mean of its divisors is an integer number (65155860).

Almost surely, 2^820694345 is an apocalyptic number.

It is an amenable number.

820694345 is a deficient number, since it is larger than the sum of its proper divisors (221799415).

820694345 is a wasteful number, since it uses less digits than its factorization.

820694345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131704.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 820694345 is about 28647.7633507400. The cubic root of 820694345 is about 936.2542748095.

The spelling of 820694345 in words is "eight hundred twenty million, six hundred ninety-four thousand, three hundred forty-five".