9999401 has 2 divisors, whose sum is σ = 9999402. Its totient is φ = 9999400.

The previous prime is 9999397. The next prime is 9999419. The reversal of 9999401 is 1049999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8179600 + 1819801 = 2860^2 + 1349^2 .

It is an emirp because it is prime and its reverse (1049999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9999401 - 2² = 9999397 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (9999481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999700 + 4999701.

It is an arithmetic number, because the mean of its divisors is an integer number (4999701).

Almost surely, 2^9999401 is an apocalyptic number.

It is an amenable number.

9999401 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999401 is an equidigital number, since it uses as much as digits as its factorization.

9999401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 41.

The square root of 9999401 is about 3162.1829485341. The cubic root of 9999401 is about 215.4391672294.

The spelling of 9999401 in words is "nine million, nine hundred ninety-nine thousand, four hundred one".