401320013 has 4 divisors (see below), whose sum is σ = 411108348. Its totient is φ = 391531680.

The previous prime is 401320001. The next prime is 401320021. The reversal of 401320013 is 310023104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38912644 + 362407369 = 6238^2 + 19037^2 .

It is a cyclic number.

It is not a de Polignac number, because 401320013 - 2⁶ = 401319949 is a prime.

It is a super-2 number, since 2×401320013² = 322115505668640338, 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 401320013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401320043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4894106 + ... + 4894187.

It is an arithmetic number, because the mean of its divisors is an integer number (102777087).

Almost surely, 2^401320013 is an apocalyptic number.

It is an amenable number.

401320013 is a deficient number, since it is larger than the sum of its proper divisors (9788335).

401320013 is an equidigital number, since it uses as much as digits as its factorization.

401320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9788334.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 401320013 is about 20032.9731442939. The cubic root of 401320013 is about 737.6159047176.

Adding to 401320013 its reverse (310023104), we get a palindrome (711343117).

The spelling of 401320013 in words is "four hundred one million, three hundred twenty thousand, thirteen".