87244491 has 8 divisors (see below), whose sum is σ = 116878144. Its totient is φ = 57886920.

The previous prime is 87244471. The next prime is 87244517. The reversal of 87244491 is 19444278.

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

It is not a de Polignac number, because 87244491 - 2¹¹ = 87242443 is a prime.

It is a super-2 number, since 2×87244491² = 15223202419698162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87244471) 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, 68281 + ... + 69546.

It is an arithmetic number, because the mean of its divisors is an integer number (14609768).

Almost surely, 2^87244491 is an apocalyptic number.

87244491 is a deficient number, since it is larger than the sum of its proper divisors (29633653).

87244491 is a wasteful number, since it uses less digits than its factorization.

87244491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138041.

The product of its digits is 64512, while the sum is 39.

The square root of 87244491 is about 9340.4759514706. The cubic root of 87244491 is about 443.5194510657.

The spelling of 87244491 in words is "eighty-seven million, two hundred forty-four thousand, four hundred ninety-one".