670447313 has 2 divisors, whose sum is σ = 670447314. Its totient is φ = 670447312.

The previous prime is 670447307. The next prime is 670447331. The reversal of 670447313 is 313744076.

Together with next prime (670447331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 413390224 + 257057089 = 20332^2 + 16033^2 .

It is a cyclic number.

It is not a de Polignac number, because 670447313 - 2²² = 666253009 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670447373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335223656 + 335223657.

It is an arithmetic number, because the mean of its divisors is an integer number (335223657).

Almost surely, 2^670447313 is an apocalyptic number.

It is an amenable number.

670447313 is a deficient number, since it is larger than the sum of its proper divisors (1).

670447313 is an equidigital number, since it uses as much as digits as its factorization.

670447313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 35.

The square root of 670447313 is about 25892.9973738075. The cubic root of 670447313 is about 875.2287023404.

The spelling of 670447313 in words is "six hundred seventy million, four hundred forty-seven thousand, three hundred thirteen".