87849509 has 12 divisors (see below), whose sum is σ = 96794208. Its totient is φ = 79671240.

The previous prime is 87849493. The next prime is 87849527. The reversal of 87849509 is 90594878.

It is not a de Polignac number, because 87849509 - 2⁴ = 87849493 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 (87849569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82112 + ... + 83174.

It is an arithmetic number, because the mean of its divisors is an integer number (8066184).

Almost surely, 2^87849509 is an apocalyptic number.

It is an amenable number.

87849509 is a deficient number, since it is larger than the sum of its proper divisors (8944699).

87849509 is a wasteful number, since it uses less digits than its factorization.

87849509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 87849509 is about 9372.8068901477. The cubic root of 87849509 is about 444.5423211775.

The spelling of 87849509 in words is "eighty-seven million, eight hundred forty-nine thousand, five hundred nine".