820923299 has 12 divisors (see below), whose sum is σ = 953860752. Its totient is φ = 692091360.

The previous prime is 820923269. The next prime is 820923347. The reversal of 820923299 is 992329028.

It is a de Polignac number, because none of the positive numbers 2^k-820923299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820923209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10289 + ... + 41805.

It is an arithmetic number, because the mean of its divisors is an integer number (79488396).

Almost surely, 2^820923299 is an apocalyptic number.

820923299 is a deficient number, since it is larger than the sum of its proper divisors (132937453).

820923299 is an equidigital number, since it uses as much as digits as its factorization.

820923299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31646 (or 31585 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 820923299 is about 28651.7590908482. The cubic root of 820923299 is about 936.3413308622.

The spelling of 820923299 in words is "eight hundred twenty million, nine hundred twenty-three thousand, two hundred ninety-nine".