400423433 has 2 divisors, whose sum is σ = 400423434. Its totient is φ = 400423432.

The previous prime is 400423393. The next prime is 400423487. The reversal of 400423433 is 334324004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216766729 + 183656704 = 14723^2 + 13552^2 .

It is a cyclic number.

It is not a de Polignac number, because 400423433 - 2¹⁰ = 400422409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400423399 and 400423408.

It is not a weakly prime, because it can be changed into another prime (400423493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200211716 + 200211717.

It is an arithmetic number, because the mean of its divisors is an integer number (200211717).

Almost surely, 2^400423433 is an apocalyptic number.

It is an amenable number.

400423433 is a deficient number, since it is larger than the sum of its proper divisors (1).

400423433 is an equidigital number, since it uses as much as digits as its factorization.

400423433 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 400423433 is about 20010.5830249896. The cubic root of 400423433 is about 737.0661981266.

Adding to 400423433 its reverse (334324004), we get a palindrome (734747437).

The spelling of 400423433 in words is "four hundred million, four hundred twenty-three thousand, four hundred thirty-three".