671042989 has 16 divisors (see below), whose sum is σ = 740657088. Its totient is φ = 605290752.

The previous prime is 671042987. The next prime is 671043047. The reversal of 671042989 is 989240176.

It is a cyclic number.

It is not a de Polignac number, because 671042989 - 2¹ = 671042987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671042987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34182 + ... + 50104.

It is an arithmetic number, because the mean of its divisors is an integer number (46291068).

Almost surely, 2^671042989 is an apocalyptic number.

It is an amenable number.

671042989 is a deficient number, since it is larger than the sum of its proper divisors (69614099).

671042989 is a wasteful number, since it uses less digits than its factorization.

671042989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16044.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 671042989 is about 25904.4974666562. The cubic root of 671042989 is about 875.4878320266.

The spelling of 671042989 in words is "six hundred seventy-one million, forty-two thousand, nine hundred eighty-nine".