670337309 has 4 divisors (see below), whose sum is σ = 705618240. Its totient is φ = 635056380.

The previous prime is 670337243. The next prime is 670337321. The reversal of 670337309 is 903733076.

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 de Polignac number, because none of the positive numbers 2^k-670337309 is a prime.

It is a super-2 number, since 2×670337309² = 898704215674722962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (670337009) 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, 17640437 + ... + 17640474.

It is an arithmetic number, because the mean of its divisors is an integer number (176404560).

Almost surely, 2^670337309 is an apocalyptic number.

It is an amenable number.

670337309 is a deficient number, since it is larger than the sum of its proper divisors (35280931).

670337309 is a wasteful number, since it uses less digits than its factorization.

670337309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35280930.

The product of its (nonzero) digits is 71442, while the sum is 38.

The square root of 670337309 is about 25890.8730829997. The cubic root of 670337309 is about 875.1808318503.

The spelling of 670337309 in words is "six hundred seventy million, three hundred thirty-seven thousand, three hundred nine".