87609447 has 12 divisors (see below), whose sum is σ = 129490504. Its totient is φ = 57047760.

The previous prime is 87609443. The next prime is 87609469. The reversal of 87609447 is 74490678.

It is not a de Polignac number, because 87609447 - 2² = 87609443 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 (87609443) 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 11 ways as a sum of consecutive naturals, for example, 112804 + ... + 113577.

Almost surely, 2^87609447 is an apocalyptic number.

87609447 is a deficient number, since it is larger than the sum of its proper divisors (41881057).

87609447 is a wasteful number, since it uses less digits than its factorization.

87609447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226430 (or 226427 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 45.

The square root of 87609447 is about 9359.9918269195. The cubic root of 87609447 is about 444.1370255184.

The spelling of 87609447 in words is "eighty-seven million, six hundred nine thousand, four hundred forty-seven".