201398401 has 8 divisors (see below), whose sum is σ = 202855400. Its totient is φ = 199946880.

The previous prime is 201398381. The next prime is 201398411. The reversal of 201398401 is 104893102.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 48233025 + 153165376 = 6945^2 + 12376^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 201398401 - 2²⁵ = 167843969 is a prime.

It is a super-2 number, since 2×201398401² = 81122631850713602, 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 201398401.

It is not an unprimeable number, because it can be changed into a prime (201398411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95365 + ... + 97453.

It is an arithmetic number, because the mean of its divisors is an integer number (25356925).

Almost surely, 2^201398401 is an apocalyptic number.

It is an amenable number.

201398401 is a deficient number, since it is larger than the sum of its proper divisors (1456999).

201398401 is a wasteful number, since it uses less digits than its factorization.

201398401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2739.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 201398401 is about 14191.4904432198. The cubic root of 201398401 is about 586.1633663731.

The spelling of 201398401 in words is "two hundred one million, three hundred ninety-eight thousand, four hundred one".