670206139 has 2 divisors, whose sum is σ = 670206140. Its totient is φ = 670206138.

The previous prime is 670206107. The next prime is 670206151. The reversal of 670206139 is 931602076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670206139 - 2⁵ = 670206107 is a prime.

It is not a weakly prime, because it can be changed into another prime (670206169) 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, 335103069 + 335103070.

It is an arithmetic number, because the mean of its divisors is an integer number (335103070).

Almost surely, 2^670206139 is an apocalyptic number.

670206139 is a deficient number, since it is larger than the sum of its proper divisors (1).

670206139 is an equidigital number, since it uses as much as digits as its factorization.

670206139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 670206139 is about 25888.3398270341. The cubic root of 670206139 is about 875.1237436965.

The spelling of 670206139 in words is "six hundred seventy million, two hundred six thousand, one hundred thirty-nine".