87651573 has 8 divisors (see below), whose sum is σ = 117001248. Its totient is φ = 58368144.

The previous prime is 87651533. The next prime is 87651583. The reversal of 87651573 is 37515678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87651573 - 2¹⁷ = 87520501 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87651533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13386 + ... + 18827.

It is an arithmetic number, because the mean of its divisors is an integer number (14625156).

Almost surely, 2^87651573 is an apocalyptic number.

It is an amenable number.

87651573 is a deficient number, since it is larger than the sum of its proper divisors (29349675).

87651573 is a wasteful number, since it uses less digits than its factorization.

87651573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33123.

The product of its digits is 176400, while the sum is 42.

The square root of 87651573 is about 9362.2418789519. The cubic root of 87651573 is about 444.2082001805.

The spelling of 87651573 in words is "eighty-seven million, six hundred fifty-one thousand, five hundred seventy-three".