670703987 has 2 divisors, whose sum is σ = 670703988. Its totient is φ = 670703986.

The previous prime is 670703977. The next prime is 670704031. The reversal of 670703987 is 789307076.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 670703987 - 2¹² = 670699891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670703947) 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, 335351993 + 335351994.

It is an arithmetic number, because the mean of its divisors is an integer number (335351994).

Almost surely, 2^670703987 is an apocalyptic number.

670703987 is a deficient number, since it is larger than the sum of its proper divisors (1).

670703987 is an equidigital number, since it uses as much as digits as its factorization.

670703987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 444528, while the sum is 47.

The square root of 670703987 is about 25897.9533361229. The cubic root of 670703987 is about 875.3403789208.

The spelling of 670703987 in words is "six hundred seventy million, seven hundred three thousand, nine hundred eighty-seven".