89724842 has 4 divisors (see below), whose sum is σ = 134587266. Its totient is φ = 44862420.

The previous prime is 89724829. The next prime is 89724871. The reversal of 89724842 is 24842798.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24842798 = 2 ⋅12421399.

It can be written as a sum of positive squares in only one way, i.e., 82101721 + 7623121 = 9061^2 + 2761^2 .

It is a junction number, because it is equal to n+sod(n) for n = 89724793 and 89724802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22431209 + ... + 22431212.

Almost surely, 2^89724842 is an apocalyptic number.

89724842 is a deficient number, since it is larger than the sum of its proper divisors (44862424).

89724842 is a wasteful number, since it uses less digits than its factorization.

89724842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44862423.

The product of its digits is 258048, while the sum is 44.

The square root of 89724842 is about 9472.3197792304. The cubic root of 89724842 is about 447.6833068198.

The spelling of 89724842 in words is "eighty-nine million, seven hundred twenty-four thousand, eight hundred forty-two".