87659791 has 4 divisors (see below), whose sum is σ = 87696000. Its totient is φ = 87623584.

The previous prime is 87659783. The next prime is 87659801. The reversal of 87659791 is 19795678.

It is a happy number.

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 87659791 - 2³ = 87659783 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 (87659731) 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, 14191 + ... + 19408.

It is an arithmetic number, because the mean of its divisors is an integer number (21924000).

Almost surely, 2^87659791 is an apocalyptic number.

87659791 is a deficient number, since it is larger than the sum of its proper divisors (36209).

87659791 is a wasteful number, since it uses less digits than its factorization.

87659791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36208.

The product of its digits is 952560, while the sum is 52.

The square root of 87659791 is about 9362.6807592698. The cubic root of 87659791 is about 444.2220823763. Note that the first 3 decimals are identical.

The spelling of 87659791 in words is "eighty-seven million, six hundred fifty-nine thousand, seven hundred ninety-one".