670877191 has 2 divisors, whose sum is σ = 670877192. Its totient is φ = 670877190.

The previous prime is 670877189. The next prime is 670877203. The reversal of 670877191 is 191778076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670877191 - 2¹ = 670877189 is a prime.

Together with 670877189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670877161) 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, 335438595 + 335438596.

It is an arithmetic number, because the mean of its divisors is an integer number (335438596).

Almost surely, 2^670877191 is an apocalyptic number.

670877191 is a deficient number, since it is larger than the sum of its proper divisors (1).

670877191 is an equidigital number, since it uses as much as digits as its factorization.

670877191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 148176, while the sum is 46.

The square root of 670877191 is about 25901.2970910725. The cubic root of 670877191 is about 875.4157223455.

The spelling of 670877191 in words is "six hundred seventy million, eight hundred seventy-seven thousand, one hundred ninety-one".