87368209 has 4 divisors (see below), whose sum is σ = 87653104. Its totient is φ = 87083316.

The previous prime is 87368189. The next prime is 87368227. The reversal of 87368209 is 90286378.

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 87368209 - 2⁹ = 87367697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87368249) 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, 141987 + ... + 142600.

It is an arithmetic number, because the mean of its divisors is an integer number (21913276).

Almost surely, 2^87368209 is an apocalyptic number.

It is an amenable number.

87368209 is a deficient number, since it is larger than the sum of its proper divisors (284895).

87368209 is a wasteful number, since it uses less digits than its factorization.

87368209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284894.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 87368209 is about 9347.0962870830. The cubic root of 87368209 is about 443.7289979083.

The spelling of 87368209 in words is "eighty-seven million, three hundred sixty-eight thousand, two hundred nine".