671260859 has 2 divisors, whose sum is σ = 671260860. Its totient is φ = 671260858.

The previous prime is 671260853. The next prime is 671260903. The reversal of 671260859 is 958062176.

It is an a-pointer prime, because the next prime (671260903) can be obtained adding 671260859 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671260859 - 2¹² = 671256763 is a prime.

It is a super-2 number, since 2×671260859² = 901182281650835762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (671260853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335630429 + 335630430.

It is an arithmetic number, because the mean of its divisors is an integer number (335630430).

Almost surely, 2^671260859 is an apocalyptic number.

671260859 is a deficient number, since it is larger than the sum of its proper divisors (1).

671260859 is an equidigital number, since it uses as much as digits as its factorization.

671260859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 671260859 is about 25908.7023797025. The cubic root of 671260859 is about 875.5825710611.

The spelling of 671260859 in words is "six hundred seventy-one million, two hundred sixty thousand, eight hundred fifty-nine".