9840401 has 2 divisors, whose sum is σ = 9840402. Its totient is φ = 9840400.

The previous prime is 9840373. The next prime is 9840431. The reversal of 9840401 is 1040489.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8994001 + 846400 = 2999^2 + 920^2 .

It is an emirp because it is prime and its reverse (1040489) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9840401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9840431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4920200 + 4920201.

It is an arithmetic number, because the mean of its divisors is an integer number (4920201).

Almost surely, 2^9840401 is an apocalyptic number.

It is an amenable number.

9840401 is a deficient number, since it is larger than the sum of its proper divisors (1).

9840401 is an equidigital number, since it uses as much as digits as its factorization.

9840401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 9840401 is about 3136.9413446859. The cubic root of 9840401 is about 214.2911647926.

The spelling of 9840401 in words is "nine million, eight hundred forty thousand, four hundred one".