9627981 has 16 divisors (see below), whose sum is σ = 14084928. Its totient is φ = 5801600.

The previous prime is 9627977. The next prime is 9627983. The reversal of 9627981 is 1897269.

9627981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 9627981 - 2² = 9627977 is a prime.

It is a super-2 number, since 2×9627981² = 185396036272722, which contains 22 as substring.

9627981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9627983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5761 + ... + 7241.

It is an arithmetic number, because the mean of its divisors is an integer number (880308).

Almost surely, 2^9627981 is an apocalyptic number.

It is an amenable number.

9627981 is a deficient number, since it is larger than the sum of its proper divisors (4456947).

9627981 is a wasteful number, since it uses less digits than its factorization.

9627981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692.

The product of its digits is 54432, while the sum is 42.

The square root of 9627981 is about 3102.8988059555. The cubic root of 9627981 is about 212.7380013881.

The spelling of 9627981 in words is "nine million, six hundred twenty-seven thousand, nine hundred eighty-one".