820492705 has 8 divisors (see below), whose sum is σ = 987336000. Its totient is φ = 654564336.

The previous prime is 820492703. The next prime is 820492711. The reversal of 820492705 is 507294028.

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 820492705 - 2¹ = 820492703 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820492703) 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, 226755 + ... + 230344.

It is an arithmetic number, because the mean of its divisors is an integer number (123417000).

Almost surely, 2^820492705 is an apocalyptic number.

It is an amenable number.

820492705 is a deficient number, since it is larger than the sum of its proper divisors (166843295).

820492705 is a wasteful number, since it uses less digits than its factorization.

820492705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457463.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 820492705 is about 28644.2438371132. The cubic root of 820492705 is about 936.1775910532.

The spelling of 820492705 in words is "eight hundred twenty million, four hundred ninety-two thousand, seven hundred five".