670134691 has 2 divisors, whose sum is σ = 670134692. Its totient is φ = 670134690.

The previous prime is 670134637. The next prime is 670134721. The reversal of 670134691 is 196431076.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670134691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 670134691.

It is not a weakly prime, because it can be changed into another prime (670134631) 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 as a sum of consecutive naturals, namely, 335067345 + 335067346.

It is an arithmetic number, because the mean of its divisors is an integer number (335067346).

Almost surely, 2^670134691 is an apocalyptic number.

670134691 is a deficient number, since it is larger than the sum of its proper divisors (1).

670134691 is an equidigital number, since it uses as much as digits as its factorization.

670134691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 670134691 is about 25886.9598639933. The cubic root of 670134691 is about 875.0926447755.

The spelling of 670134691 in words is "six hundred seventy million, one hundred thirty-four thousand, six hundred ninety-one".