398604001 has 2 divisors, whose sum is σ = 398604002. Its totient is φ = 398604000.

The previous prime is 398603999. The next prime is 398604029. The reversal of 398604001 is 100406893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344139601 + 54464400 = 18551^2 + 7380^2 .

It is an emirp because it is prime and its reverse (100406893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 398604001 - 2¹ = 398603999 is a prime.

It is a super-2 number, since 2×398604001² = 317770299226416002, which contains 22 as substring.

Together with 398603999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (398604061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199302000 + 199302001.

It is an arithmetic number, because the mean of its divisors is an integer number (199302001).

Almost surely, 2^398604001 is an apocalyptic number.

It is an amenable number.

398604001 is a deficient number, since it is larger than the sum of its proper divisors (1).

398604001 is an equidigital number, since it uses as much as digits as its factorization.

398604001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 398604001 is about 19965.0695215419. The cubic root of 398604001 is about 735.9481499242.

The spelling of 398604001 in words is "three hundred ninety-eight million, six hundred four thousand, one".