671652087 has 4 divisors (see below), whose sum is σ = 895536120. Its totient is φ = 447768056.

The previous prime is 671652067. The next prime is 671652089. The reversal of 671652087 is 780256176.

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 671652087 - 2⁸ = 671651831 is a prime.

It is a super-2 number, since 2×671652087² = 902233051942911138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671652089) 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, 111942012 + ... + 111942017.

It is an arithmetic number, because the mean of its divisors is an integer number (223884030).

Almost surely, 2^671652087 is an apocalyptic number.

671652087 is a deficient number, since it is larger than the sum of its proper divisors (223884033).

671652087 is a wasteful number, since it uses less digits than its factorization.

671652087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223884032.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 671652087 is about 25916.2514071769. The cubic root of 671652087 is about 875.7526419983.

The spelling of 671652087 in words is "six hundred seventy-one million, six hundred fifty-two thousand, eighty-seven".