87243985 has 8 divisors (see below), whose sum is σ = 106920576. Its totient is φ = 68310000.

The previous prime is 87243967. The next prime is 87244007. The reversal of 87243985 is 58934278.

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

It is not a de Polignac number, because 87243985 - 2¹⁹ = 86719697 is a prime.

It is a super-2 number, since 2×87243985² = 15223025837360450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185391 + ... + 185860.

It is an arithmetic number, because the mean of its divisors is an integer number (13365072).

Almost surely, 2^87243985 is an apocalyptic number.

It is an amenable number.

87243985 is a deficient number, since it is larger than the sum of its proper divisors (19676591).

87243985 is a wasteful number, since it uses less digits than its factorization.

87243985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371303.

The product of its digits is 483840, while the sum is 46.

The square root of 87243985 is about 9340.4488650171. The cubic root of 87243985 is about 443.5185936236.

The spelling of 87243985 in words is "eighty-seven million, two hundred forty-three thousand, nine hundred eighty-five".