87200661 has 4 divisors (see below), whose sum is σ = 116267552. Its totient is φ = 58133772.

The previous prime is 87200657. The next prime is 87200683. The reversal of 87200661 is 16600278.

It is a happy number.

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 not a de Polignac number, because 87200661 - 2² = 87200657 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 (87200621) 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, 14533441 + ... + 14533446.

It is an arithmetic number, because the mean of its divisors is an integer number (29066888).

Almost surely, 2^87200661 is an apocalyptic number.

It is an amenable number.

87200661 is a deficient number, since it is larger than the sum of its proper divisors (29066891).

87200661 is a wasteful number, since it uses less digits than its factorization.

87200661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29066890.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 87200661 is about 9338.1294165373. The cubic root of 87200661 is about 443.4451666665.

The spelling of 87200661 in words is "eighty-seven million, two hundred thousand, six hundred sixty-one".