670921313 has 8 divisors (see below), whose sum is σ = 692914176. Its totient is φ = 648950400.

The previous prime is 670921301. The next prime is 670921343. The reversal of 670921313 is 313129076.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670921313 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 670921313.

It is not an unprimeable number, because it can be changed into a prime (670921343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76145 + ... + 84497.

It is an arithmetic number, because the mean of its divisors is an integer number (86614272).

Almost surely, 2^670921313 is an apocalyptic number.

It is an amenable number.

670921313 is a deficient number, since it is larger than the sum of its proper divisors (21992863).

670921313 is a wasteful number, since it uses less digits than its factorization.

670921313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10975.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 670921313 is about 25902.1488104752. The cubic root of 670921313 is about 875.4349132627.

The spelling of 670921313 in words is "six hundred seventy million, nine hundred twenty-one thousand, three hundred thirteen".