671303287 has 4 divisors (see below), whose sum is σ = 671504760. Its totient is φ = 671101816.

The previous prime is 671303279. The next prime is 671303309. The reversal of 671303287 is 782303176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671303287 - 2³ = 671303279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671303257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95653 + ... + 102430.

It is an arithmetic number, because the mean of its divisors is an integer number (167876190).

Almost surely, 2^671303287 is an apocalyptic number.

671303287 is a deficient number, since it is larger than the sum of its proper divisors (201473).

671303287 is a wasteful number, since it uses less digits than its factorization.

671303287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201472.

The product of its (nonzero) digits is 42336, while the sum is 37.

The square root of 671303287 is about 25909.5211650080. The cubic root of 671303287 is about 875.6010181542.

The spelling of 671303287 in words is "six hundred seventy-one million, three hundred three thousand, two hundred eighty-seven".