670493647 has 2 divisors, whose sum is σ = 670493648. Its totient is φ = 670493646.

The previous prime is 670493627. The next prime is 670493653. The reversal of 670493647 is 746394076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670493647 - 2⁷ = 670493519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 670493597 and 670493606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670493627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335246823 + 335246824.

It is an arithmetic number, because the mean of its divisors is an integer number (335246824).

Almost surely, 2^670493647 is an apocalyptic number.

670493647 is a deficient number, since it is larger than the sum of its proper divisors (1).

670493647 is an equidigital number, since it uses as much as digits as its factorization.

670493647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 46.

The square root of 670493647 is about 25893.8920790213. The cubic root of 670493647 is about 875.2488639607.

The spelling of 670493647 in words is "six hundred seventy million, four hundred ninety-three thousand, six hundred forty-seven".