400996423 has 2 divisors, whose sum is σ = 400996424. Its totient is φ = 400996422.

The previous prime is 400996403. The next prime is 400996447. The reversal of 400996423 is 324699004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400996423 - 2⁹ = 400995911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400996403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200498211 + 200498212.

It is an arithmetic number, because the mean of its divisors is an integer number (200498212).

Almost surely, 2^400996423 is an apocalyptic number.

400996423 is a deficient number, since it is larger than the sum of its proper divisors (1).

400996423 is an equidigital number, since it uses as much as digits as its factorization.

400996423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 400996423 is about 20024.8950808737. The cubic root of 400996423 is about 737.4176013659.

The spelling of 400996423 in words is "four hundred million, nine hundred ninety-six thousand, four hundred twenty-three".