87241643 has 4 divisors (see below), whose sum is σ = 88436808. Its totient is φ = 86046480.

The previous prime is 87241621. The next prime is 87241669. The reversal of 87241643 is 34614278.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87241643 - 2⁶ = 87241579 is a prime.

It is a super-2 number, since 2×87241643² = 15222208546678898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87241613) 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, 597473 + ... + 597618.

It is an arithmetic number, because the mean of its divisors is an integer number (22109202).

Almost surely, 2^87241643 is an apocalyptic number.

87241643 is a deficient number, since it is larger than the sum of its proper divisors (1195165).

87241643 is a wasteful number, since it uses less digits than its factorization.

87241643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1195164.

The product of its digits is 32256, while the sum is 35.

The square root of 87241643 is about 9340.3234954685. The cubic root of 87241643 is about 443.5146249457.

The spelling of 87241643 in words is "eighty-seven million, two hundred forty-one thousand, six hundred forty-three".