670823999 has 2 divisors, whose sum is σ = 670824000. Its totient is φ = 670823998.

The previous prime is 670823977. The next prime is 670824019. The reversal of 670823999 is 999328076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670823999 - 2²⁰ = 669775423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 670823999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670823929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335411999 + 335412000.

It is an arithmetic number, because the mean of its divisors is an integer number (335412000).

Almost surely, 2^670823999 is an apocalyptic number.

670823999 is a deficient number, since it is larger than the sum of its proper divisors (1).

670823999 is an equidigital number, since it uses as much as digits as its factorization.

670823999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 670823999 is about 25900.2702495553. The cubic root of 670823999 is about 875.3925853022.

The spelling of 670823999 in words is "six hundred seventy million, eight hundred twenty-three thousand, nine hundred ninety-nine".