670853909 has 4 divisors (see below), whose sum is σ = 731840640. Its totient is φ = 609867180.

The previous prime is 670853861. The next prime is 670853917. The reversal of 670853909 is 909358076.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670853909 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 (670853929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30493349 + ... + 30493370.

It is an arithmetic number, because the mean of its divisors is an integer number (182960160).

Almost surely, 2^670853909 is an apocalyptic number.

It is an amenable number.

670853909 is a deficient number, since it is larger than the sum of its proper divisors (60986731).

670853909 is a wasteful number, since it uses less digits than its factorization.

670853909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60986730.

The product of its (nonzero) digits is 408240, while the sum is 47.

The square root of 670853909 is about 25900.8476502218. The cubic root of 670853909 is about 875.4055954724.

The spelling of 670853909 in words is "six hundred seventy million, eight hundred fifty-three thousand, nine hundred nine".