400134223 has 2 divisors, whose sum is σ = 400134224. Its totient is φ = 400134222.

The previous prime is 400134209. The next prime is 400134233. The reversal of 400134223 is 322431004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400134223 - 2⁵ = 400134191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400134223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400134233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200067111 + 200067112.

It is an arithmetic number, because the mean of its divisors is an integer number (200067112).

Almost surely, 2^400134223 is an apocalyptic number.

400134223 is a deficient number, since it is larger than the sum of its proper divisors (1).

400134223 is an equidigital number, since it uses as much as digits as its factorization.

400134223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400134223 is about 20003.3552935501. The cubic root of 400134223 is about 736.8887041383. Note that the first 3 decimals are identical.

Adding to 400134223 its reverse (322431004), we get a palindrome (722565227).

The spelling of 400134223 in words is "four hundred million, one hundred thirty-four thousand, two hundred twenty-three".