9640981 has 8 divisors (see below), whose sum is σ = 11041280. Its totient is φ = 8246448.

The previous prime is 9640973. The next prime is 9640991. The reversal of 9640981 is 1890469.

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

It is not a de Polignac number, because 9640981 - 2³ = 9640973 is a prime.

It is a super-2 number, since 2×9640981² = 185897029284722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9640981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9640991) 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, 3115 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (1380160).

Almost surely, 2^9640981 is an apocalyptic number.

It is an amenable number.

9640981 is a deficient number, since it is larger than the sum of its proper divisors (1400299).

9640981 is a wasteful number, since it uses less digits than its factorization.

9640981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 9640981 is about 3104.9929146457. The cubic root of 9640981 is about 212.8337068194.

The spelling of 9640981 in words is "nine million, six hundred forty thousand, nine hundred eighty-one".