89871623 has 4 divisors (see below), whose sum is σ = 91567368. Its totient is φ = 88175880.

The previous prime is 89871619. The next prime is 89871637. The reversal of 89871623 is 32617898.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32617898 = 2 ⋅16308949.

It is a cyclic number.

It is not a de Polignac number, because 89871623 - 2² = 89871619 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89871643) 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, 847793 + ... + 847898.

It is an arithmetic number, because the mean of its divisors is an integer number (22891842).

Almost surely, 2^89871623 is an apocalyptic number.

89871623 is a deficient number, since it is larger than the sum of its proper divisors (1695745).

89871623 is a wasteful number, since it uses less digits than its factorization.

89871623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1695744.

The product of its digits is 145152, while the sum is 44.

The square root of 89871623 is about 9480.0645040000. The cubic root of 89871623 is about 447.9272957458.

The spelling of 89871623 in words is "eighty-nine million, eight hundred seventy-one thousand, six hundred twenty-three".