87645299 has 4 divisors (see below), whose sum is σ = 100166064. Its totient is φ = 75124536.

The previous prime is 87645289. The next prime is 87645301. The reversal of 87645299 is 99254678.

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 87645299 - 2²⁰ = 86596723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87645289) 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, 6260372 + ... + 6260385.

It is an arithmetic number, because the mean of its divisors is an integer number (25041516).

Almost surely, 2^87645299 is an apocalyptic number.

87645299 is a deficient number, since it is larger than the sum of its proper divisors (12520765).

87645299 is a wasteful number, since it uses less digits than its factorization.

87645299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12520764.

The product of its digits is 1088640, while the sum is 50.

The square root of 87645299 is about 9361.9068036378. The cubic root of 87645299 is about 444.1976012882.

The spelling of 87645299 in words is "eighty-seven million, six hundred forty-five thousand, two hundred ninety-nine".