404190001 has 4 divisors (see below), whose sum is σ = 404236404. Its totient is φ = 404143600.

The previous prime is 404189957. The next prime is 404190019. The reversal of 404190001 is 100091404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 76580001 + 327610000 = 8751^2 + 18100^2 .

It is a cyclic number.

It is not a de Polignac number, because 404190001 - 2²⁵ = 370635569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (404190041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5770 + ... + 29011.

It is an arithmetic number, because the mean of its divisors is an integer number (101059101).

Almost surely, 2^404190001 is an apocalyptic number.

It is an amenable number.

404190001 is a deficient number, since it is larger than the sum of its proper divisors (46403).

404190001 is a wasteful number, since it uses less digits than its factorization.

404190001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46402.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 404190001 is about 20104.4771381899. The cubic root of 404190001 is about 739.3700512999.

The spelling of 404190001 in words is "four hundred four million, one hundred ninety thousand, one".