670065397 has 4 divisors (see below), whose sum is σ = 670117696. Its totient is φ = 670013100.

The previous prime is 670065377. The next prime is 670065443. The reversal of 670065397 is 793560076.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670065397 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 (670065317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7522 + ... + 37372.

It is an arithmetic number, because the mean of its divisors is an integer number (167529424).

Almost surely, 2^670065397 is an apocalyptic number.

It is an amenable number.

670065397 is a deficient number, since it is larger than the sum of its proper divisors (52299).

670065397 is a wasteful number, since it uses less digits than its factorization.

670065397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52298.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 670065397 is about 25885.6214335295. The cubic root of 670065397 is about 875.0624813070.

The spelling of 670065397 in words is "six hundred seventy million, sixty-five thousand, three hundred ninety-seven".