670009999 has 4 divisors (see below), whose sum is σ = 670449160. Its totient is φ = 669570840.

The previous prime is 670009993. The next prime is 670010009. The reversal of 670009999 is 999900076.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 670009999 - 2¹⁷ = 669878927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670009993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217284 + ... + 220345.

It is an arithmetic number, because the mean of its divisors is an integer number (167612290).

Almost surely, 2^670009999 is an apocalyptic number.

670009999 is a deficient number, since it is larger than the sum of its proper divisors (439161).

670009999 is a wasteful number, since it uses less digits than its factorization.

670009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439160.

The product of its (nonzero) digits is 275562, while the sum is 49.

The square root of 670009999 is about 25884.5513579046. The cubic root of 670009999 is about 875.0383652294.

The spelling of 670009999 in words is "six hundred seventy million, nine thousand, nine hundred ninety-nine".