9981598 has 8 divisors (see below), whose sum is σ = 16333560. Its totient is φ = 4537080.

The previous prime is 9981557. The next prime is 9981599. The reversal of 9981598 is 8951899.

It is a happy number.

9981598 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9981599) 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, 226833 + ... + 226876.

It is an arithmetic number, because the mean of its divisors is an integer number (2041695).

Almost surely, 2^9981598 is an apocalyptic number.

9981598 is a deficient number, since it is larger than the sum of its proper divisors (6351962).

9981598 is a wasteful number, since it uses less digits than its factorization.

9981598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453722.

The product of its digits is 233280, while the sum is 49.

The square root of 9981598 is about 3159.3667086934. The cubic root of 9981598 is about 215.3112348337.

The spelling of 9981598 in words is "nine million, nine hundred eighty-one thousand, five hundred ninety-eight".