87671573 has 4 divisors (see below), whose sum is σ = 95641728. Its totient is φ = 79701420.

The previous prime is 87671569. The next prime is 87671587. The reversal of 87671573 is 37517678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87671573 - 2² = 87671569 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 (87671543) 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, 3985061 + ... + 3985082.

It is an arithmetic number, because the mean of its divisors is an integer number (23910432).

Almost surely, 2^87671573 is an apocalyptic number.

It is an amenable number.

87671573 is a deficient number, since it is larger than the sum of its proper divisors (7970155).

87671573 is a wasteful number, since it uses less digits than its factorization.

87671573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7970154.

The product of its digits is 246960, while the sum is 44.

The square root of 87671573 is about 9363.3099382644. The cubic root of 87671573 is about 444.2419835193.

The spelling of 87671573 in words is "eighty-seven million, six hundred seventy-one thousand, five hundred seventy-three".