87709623 has 4 divisors (see below), whose sum is σ = 116946168. Its totient is φ = 58473080.

The previous prime is 87709591. The next prime is 87709627. The reversal of 87709623 is 32690778.

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 87709623 - 2⁵ = 87709591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87709627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14618268 + ... + 14618273.

It is an arithmetic number, because the mean of its divisors is an integer number (29236542).

Almost surely, 2^87709623 is an apocalyptic number.

87709623 is a deficient number, since it is larger than the sum of its proper divisors (29236545).

87709623 is a wasteful number, since it uses less digits than its factorization.

87709623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29236544.

The product of its (nonzero) digits is 127008, while the sum is 42.

The square root of 87709623 is about 9365.3415848008. The cubic root of 87709623 is about 444.3062421385.

The spelling of 87709623 in words is "eighty-seven million, seven hundred nine thousand, six hundred twenty-three".