404004431371 has 2 divisors, whose sum is σ = 404004431372. Its totient is φ = 404004431370.

The previous prime is 404004431351. The next prime is 404004431393. The reversal of 404004431371 is 173134400404.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404004431371 - 2¹⁷ = 404004300299 is a prime.

It is not a weakly prime, because it can be changed into another prime (404004431351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202002215685 + 202002215686.

It is an arithmetic number, because the mean of its divisors is an integer number (202002215686).

Almost surely, 2^404004431371 is an apocalyptic number.

404004431371 is a deficient number, since it is larger than the sum of its proper divisors (1).

404004431371 is an equidigital number, since it uses as much as digits as its factorization.

404004431371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 404004431371 its reverse (173134400404), we get a palindrome (577138831775).

The spelling of 404004431371 in words is "four hundred four billion, four million, four hundred thirty-one thousand, three hundred seventy-one".