87444553 has 8 divisors (see below), whose sum is σ = 100599680. Its totient is φ = 74455200.

The previous prime is 87444509. The next prime is 87444571. The reversal of 87444553 is 35544478.

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 87444553 - 2⁹ = 87444041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87444053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40308 + ... + 42421.

It is an arithmetic number, because the mean of its divisors is an integer number (12574960).

Almost surely, 2^87444553 is an apocalyptic number.

It is an amenable number.

87444553 is a deficient number, since it is larger than the sum of its proper divisors (13155127).

87444553 is a wasteful number, since it uses less digits than its factorization.

87444553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82887.

The product of its digits is 268800, while the sum is 40.

The square root of 87444553 is about 9351.1792304500. The cubic root of 87444553 is about 443.8582065553.

The spelling of 87444553 in words is "eighty-seven million, four hundred forty-four thousand, five hundred fifty-three".