87698009 has 4 divisors (see below), whose sum is σ = 100226304. Its totient is φ = 75169716.

The previous prime is 87698003. The next prime is 87698047. The reversal of 87698009 is 90089678.

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 87698009 - 2²⁴ = 70920793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87698003) 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, 6264137 + ... + 6264150.

It is an arithmetic number, because the mean of its divisors is an integer number (25056576).

Almost surely, 2^87698009 is an apocalyptic number.

It is an amenable number.

87698009 is a deficient number, since it is larger than the sum of its proper divisors (12528295).

87698009 is a wasteful number, since it uses less digits than its factorization.

87698009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12528294.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 87698009 is about 9364.7215121433. The cubic root of 87698009 is about 444.2866304536.

The spelling of 87698009 in words is "eighty-seven million, six hundred ninety-eight thousand, nine".