87651547 has 4 divisors (see below), whose sum is σ = 87715600. Its totient is φ = 87587496.

The previous prime is 87651533. The next prime is 87651583. The reversal of 87651547 is 74515678.

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 87651547 - 2¹⁵ = 87618779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87651517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29928 + ... + 32725.

It is an arithmetic number, because the mean of its divisors is an integer number (21928900).

Almost surely, 2^87651547 is an apocalyptic number.

87651547 is a deficient number, since it is larger than the sum of its proper divisors (64053).

87651547 is a wasteful number, since it uses less digits than its factorization.

87651547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64052.

The product of its digits is 235200, while the sum is 43.

The square root of 87651547 is about 9362.2404903954. The cubic root of 87651547 is about 444.2081562588.

The spelling of 87651547 in words is "eighty-seven million, six hundred fifty-one thousand, five hundred forty-seven".