820734923 has 2 divisors, whose sum is σ = 820734924. Its totient is φ = 820734922.

The previous prime is 820734881. The next prime is 820734973. The reversal of 820734923 is 329437028.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 820734923 - 2¹⁴ = 820718539 is a prime.

It is not a weakly prime, because it can be changed into another prime (820734973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 410367461 + 410367462.

It is an arithmetic number, because the mean of its divisors is an integer number (410367462).

Almost surely, 2^820734923 is an apocalyptic number.

820734923 is a deficient number, since it is larger than the sum of its proper divisors (1).

820734923 is an equidigital number, since it uses as much as digits as its factorization.

820734923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 820734923 is about 28648.4715648148. The cubic root of 820734923 is about 936.2697051176.

The spelling of 820734923 in words is "eight hundred twenty million, seven hundred thirty-four thousand, nine hundred twenty-three".