89721842 has 24 divisors (see below), whose sum is σ = 157333680. Its totient is φ = 38261160.

The previous prime is 89721839. The next prime is 89721847. The reversal of 89721842 is 24812798.

It is a self number, because there is not a number n which added to its sum of digits gives 89721842.

It is not an unprimeable number, because it can be changed into a prime (89721847) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18509 + ... + 22847.

It is an arithmetic number, because the mean of its divisors is an integer number (6555570).

Almost surely, 2^89721842 is an apocalyptic number.

89721842 is a deficient number, since it is larger than the sum of its proper divisors (67611838).

89721842 is a wasteful number, since it uses less digits than its factorization.

89721842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4566 (or 4559 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 89721842 is about 9472.1614217664. The cubic root of 89721842 is about 447.6783172507.

The spelling of 89721842 in words is "eighty-nine million, seven hundred twenty-one thousand, eight hundred forty-two".