9619981 has 8 divisors (see below), whose sum is σ = 11018304. Its totient is φ = 8227680.

The previous prime is 9619979. The next prime is 9619991. The reversal of 9619981 is 1899169.

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

It is a cyclic number.

It is not a de Polignac number, because 9619981 - 2¹ = 9619979 is a prime.

It is a super-2 number, since 2×9619981² = 185088068880722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9619901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2721 + ... + 5161.

It is an arithmetic number, because the mean of its divisors is an integer number (1377288).

Almost surely, 2^9619981 is an apocalyptic number.

It is an amenable number.

9619981 is a deficient number, since it is larger than the sum of its proper divisors (1398323).

9619981 is a wasteful number, since it uses less digits than its factorization.

9619981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011.

The product of its digits is 34992, while the sum is 43.

The square root of 9619981 is about 3101.6094209297. The cubic root of 9619981 is about 212.6790629113.

The spelling of 9619981 in words is "nine million, six hundred nineteen thousand, nine hundred eighty-one".