670212397 has 2 divisors, whose sum is σ = 670212398. Its totient is φ = 670212396.

The previous prime is 670212391. The next prime is 670212463. The reversal of 670212397 is 793212076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 664917796 + 5294601 = 25786^2 + 2301^2 .

It is a cyclic number.

It is not a de Polignac number, because 670212397 - 2¹⁹ = 669688109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670212391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335106198 + 335106199.

It is an arithmetic number, because the mean of its divisors is an integer number (335106199).

Almost surely, 2^670212397 is an apocalyptic number.

It is an amenable number.

670212397 is a deficient number, since it is larger than the sum of its proper divisors (1).

670212397 is an equidigital number, since it uses as much as digits as its factorization.

670212397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 670212397 is about 25888.4606919763. The cubic root of 670212397 is about 875.1264674889.

The spelling of 670212397 in words is "six hundred seventy million, two hundred twelve thousand, three hundred ninety-seven".