404004143 has 2 divisors, whose sum is σ = 404004144. Its totient is φ = 404004142.

The previous prime is 404004109. The next prime is 404004157. The reversal of 404004143 is 341400404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-404004143 is a prime.

It is a super-2 number, since 2×404004143² = 326438695122328898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404004043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202002071 + 202002072.

It is an arithmetic number, because the mean of its divisors is an integer number (202002072).

Almost surely, 2^404004143 is an apocalyptic number.

404004143 is a deficient number, since it is larger than the sum of its proper divisors (1).

404004143 is an equidigital number, since it uses as much as digits as its factorization.

404004143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 404004143 is about 20099.8543029545. The cubic root of 404004143 is about 739.2567061677.

Adding to 404004143 its reverse (341400404), we get a palindrome (745404547).

The spelling of 404004143 in words is "four hundred four million, four thousand, one hundred forty-three".