9981594 has 36 divisors (see below), whose sum is σ = 25159914. Its totient is φ = 2851632.

The previous prime is 9981557. The next prime is 9981599. The reversal of 9981594 is 4951899.

It can be written as a sum of positive squares in only one way, i.e., 5832225 + 4149369 = 2415^2 + 2037^2 .

It is not an unprimeable number, because it can be changed into a prime (9981599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4777 + ... + 6540.

Almost surely, 2^9981594 is an apocalyptic number.

9981594 is an abundant number, since it is smaller than the sum of its proper divisors (15178320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9981594 is a wasteful number, since it uses less digits than its factorization.

9981594 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11339 (or 11329 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 9981594 is about 3159.3660756551. The cubic root of 9981594 is about 215.3112060726.

The spelling of 9981594 in words is "nine million, nine hundred eighty-one thousand, five hundred ninety-four".