670999873 has 2 divisors, whose sum is σ = 670999874. Its totient is φ = 670999872.

The previous prime is 670999859. The next prime is 670999897. The reversal of 670999873 is 378999076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568727104 + 102272769 = 23848^2 + 10113^2 .

It is a cyclic number.

It is not a de Polignac number, because 670999873 - 2¹⁷ = 670868801 is a prime.

It is a super-2 number, since 2×670999873² = 900481659132032258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (670999073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335499936 + 335499937.

It is an arithmetic number, because the mean of its divisors is an integer number (335499937).

Almost surely, 2^670999873 is an apocalyptic number.

It is an amenable number.

670999873 is a deficient number, since it is larger than the sum of its proper divisors (1).

670999873 is an equidigital number, since it uses as much as digits as its factorization.

670999873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5143824, while the sum is 58.

The square root of 670999873 is about 25903.6652425868. The cubic root of 670999873 is about 875.4690809469.

The spelling of 670999873 in words is "six hundred seventy million, nine hundred ninety-nine thousand, eight hundred seventy-three".