401404421023 has 4 divisors (see below), whose sum is σ = 401518557160. Its totient is φ = 401290284888.

The previous prime is 401404420999. The next prime is 401404421071. The reversal of 401404421023 is 320124404104.

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

It is a cyclic number.

It is not a de Polignac number, because 401404421023 - 2⁹ = 401404420511 is a prime.

It is a super-2 number, since 2×401404421023² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401404491023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57062793 + ... + 57069826.

It is an arithmetic number, because the mean of its divisors is an integer number (100379639290).

Almost surely, 2^401404421023 is an apocalyptic number.

401404421023 is a deficient number, since it is larger than the sum of its proper divisors (114136137).

401404421023 is a wasteful number, since it uses less digits than its factorization.

401404421023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114136136.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 401404421023 its reverse (320124404104), we get a palindrome (721528825127).

The spelling of 401404421023 in words is "four hundred one billion, four hundred four million, four hundred twenty-one thousand, twenty-three".