87443623 has 4 divisors (see below), whose sum is σ = 87546280. Its totient is φ = 87340968.

The previous prime is 87443621. The next prime is 87443627. The reversal of 87443623 is 32634478.

It is a happy number.

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 87443623 - 2¹ = 87443621 is a prime.

It is a super-2 number, since 2×87443623² = 15292774406732258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87443621) 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, 50040 + ... + 51757.

It is an arithmetic number, because the mean of its divisors is an integer number (21886570).

Almost surely, 2^87443623 is an apocalyptic number.

87443623 is a deficient number, since it is larger than the sum of its proper divisors (102657).

87443623 is a wasteful number, since it uses less digits than its factorization.

87443623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102656.

The product of its digits is 96768, while the sum is 37.

The square root of 87443623 is about 9351.1295039690. The cubic root of 87443623 is about 443.8566330264.

The spelling of 87443623 in words is "eighty-seven million, four hundred forty-three thousand, six hundred twenty-three".