87449969 has 8 divisors (see below), whose sum is σ = 88227048. Its totient is φ = 86676480.

The previous prime is 87449963. The next prime is 87450001. The reversal of 87449969 is 96994478.

It can be written as a sum of positive squares in 4 ways, for example, as 270400 + 87179569 = 520^2 + 9337^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87449969 - 2²⁴ = 70672753 is a prime.

It is a super-2 number, since 2×87449969² = 15294994156201922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87449963) 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 7 ways as a sum of consecutive naturals, for example, 71249 + ... + 72465.

It is an arithmetic number, because the mean of its divisors is an integer number (11028381).

Almost surely, 2^87449969 is an apocalyptic number.

It is an amenable number.

87449969 is a deficient number, since it is larger than the sum of its proper divisors (777079).

87449969 is a wasteful number, since it uses less digits than its factorization.

87449969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795.

The product of its digits is 3919104, while the sum is 56.

The square root of 87449969 is about 9351.4688151113. The cubic root of 87449969 is about 443.8673700246.

The spelling of 87449969 in words is "eighty-seven million, four hundred forty-nine thousand, nine hundred sixty-nine".