400104431 has 2 divisors, whose sum is σ = 400104432. Its totient is φ = 400104430.

The previous prime is 400104407. The next prime is 400104437. The reversal of 400104431 is 134401004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400104431 - 2²⁶ = 332995567 is a prime.

It is a super-2 number, since 2×400104431² = 320167111411667522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400104437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200052215 + 200052216.

It is an arithmetic number, because the mean of its divisors is an integer number (200052216).

Almost surely, 2^400104431 is an apocalyptic number.

400104431 is a deficient number, since it is larger than the sum of its proper divisors (1).

400104431 is an equidigital number, since it uses as much as digits as its factorization.

400104431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400104431 is about 20002.6106046186. The cubic root of 400104431 is about 736.8704153309.

Adding to 400104431 its reverse (134401004), we get a palindrome (534505435).

The spelling of 400104431 in words is "four hundred million, one hundred four thousand, four hundred thirty-one".