670631307 has 4 divisors (see below), whose sum is σ = 894175080. Its totient is φ = 447087536.

The previous prime is 670631267. The next prime is 670631323. The reversal of 670631307 is 703136076.

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 670631307 - 2⁶ = 670631243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (670631407) 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, 111771882 + ... + 111771887.

It is an arithmetic number, because the mean of its divisors is an integer number (223543770).

Almost surely, 2^670631307 is an apocalyptic number.

670631307 is a deficient number, since it is larger than the sum of its proper divisors (223543773).

670631307 is a wasteful number, since it uses less digits than its factorization.

670631307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223543772.

The product of its (nonzero) digits is 15876, while the sum is 33.

The square root of 670631307 is about 25896.5500984204. The cubic root of 670631307 is about 875.3087593897.

The spelling of 670631307 in words is "six hundred seventy million, six hundred thirty-one thousand, three hundred seven".