87444881 has 4 divisors (see below), whose sum is σ = 87654000. Its totient is φ = 87235764.

The previous prime is 87444871. The next prime is 87444913. The reversal of 87444881 is 18844478.

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 a cyclic number.

It is not a de Polignac number, because 87444881 - 2⁶ = 87444817 is a prime.

It is a super-2 number, since 2×87444881² = 15293214426208322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87444811) 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, 103931 + ... + 104768.

It is an arithmetic number, because the mean of its divisors is an integer number (21913500).

Almost surely, 2^87444881 is an apocalyptic number.

It is an amenable number.

87444881 is a deficient number, since it is larger than the sum of its proper divisors (209119).

87444881 is a wasteful number, since it uses less digits than its factorization.

87444881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209118.

The product of its digits is 229376, while the sum is 44.

The square root of 87444881 is about 9351.1967683286. The cubic root of 87444881 is about 443.8587615177.

The spelling of 87444881 in words is "eighty-seven million, four hundred forty-four thousand, eight hundred eighty-one".