400023223 has 2 divisors, whose sum is σ = 400023224. Its totient is φ = 400023222.

The previous prime is 400023181. The next prime is 400023257. The reversal of 400023223 is 322320004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400023223 - 2¹⁷ = 399892151 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400023197 and 400023206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400023623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200011611 + 200011612.

It is an arithmetic number, because the mean of its divisors is an integer number (200011612).

Almost surely, 2^400023223 is an apocalyptic number.

400023223 is a deficient number, since it is larger than the sum of its proper divisors (1).

400023223 is an equidigital number, since it uses as much as digits as its factorization.

400023223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 400023223 is about 20000.5805665736. The cubic root of 400023223 is about 736.8205584961.

Adding to 400023223 its reverse (322320004), we get a palindrome (722343227).

The spelling of 400023223 in words is "four hundred million, twenty-three thousand, two hundred twenty-three".