9979641 has 12 divisors (see below), whose sum is σ = 16474432. Its totient is φ = 5702616.

The previous prime is 9979639. The next prime is 9979643. The reversal of 9979641 is 1469799.

9979641 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9979639) and next prime (9979643).

It is not a de Polignac number, because 9979641 - 2¹ = 9979639 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9979643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79141 + ... + 79266.

Almost surely, 2^9979641 is an apocalyptic number.

It is an amenable number.

9979641 is a deficient number, since it is larger than the sum of its proper divisors (6494791).

9979641 is a wasteful number, since it uses less digits than its factorization.

9979641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158420 (or 158417 counting only the distinct ones).

The product of its digits is 122472, while the sum is 45.

The square root of 9979641 is about 3159.0569795431. The cubic root of 9979641 is about 215.2971625503.

The spelling of 9979641 in words is "nine million, nine hundred seventy-nine thousand, six hundred forty-one".