820912113 has 24 divisors (see below), whose sum is σ = 1414078848. Its totient is φ = 448696512.

The previous prime is 820912111. The next prime is 820912123. The reversal of 820912113 is 311219028.

It is not a de Polignac number, because 820912113 - 2¹ = 820912111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (820912111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281820 + ... + 284717.

It is an arithmetic number, because the mean of its divisors is an integer number (58919952).

Almost surely, 2^820912113 is an apocalyptic number.

It is an amenable number.

820912113 is a deficient number, since it is larger than the sum of its proper divisors (593166735).

820912113 is a wasteful number, since it uses less digits than its factorization.

820912113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566573 (or 566570 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 820912113 is about 28651.5638840186. The cubic root of 820912113 is about 936.3370779429.

The spelling of 820912113 in words is "eight hundred twenty million, nine hundred twelve thousand, one hundred thirteen".