87244489 has 4 divisors (see below), whose sum is σ = 87313360. Its totient is φ = 87175620.

The previous prime is 87244471. The next prime is 87244517. The reversal of 87244489 is 98444278.

It is a happy number.

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 87244489 - 2¹⁵ = 87211721 is a prime.

It is a super-2 number, since 2×87244489² = 15223201721742242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87244439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32499 + ... + 35080.

It is an arithmetic number, because the mean of its divisors is an integer number (21828340).

Almost surely, 2^87244489 is an apocalyptic number.

It is an amenable number.

87244489 is a deficient number, since it is larger than the sum of its proper divisors (68871).

87244489 is a wasteful number, since it uses less digits than its factorization.

87244489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68870.

The product of its digits is 516096, while the sum is 46.

The square root of 87244489 is about 9340.4758444096. The cubic root of 87244489 is about 443.5194476766.

The spelling of 87244489 in words is "eighty-seven million, two hundred forty-four thousand, four hundred eighty-nine".