400802023 has 2 divisors, whose sum is σ = 400802024. Its totient is φ = 400802022.

The previous prime is 400802009. The next prime is 400802027. The reversal of 400802023 is 320208004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400802023 - 2¹³ = 400793831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400802027) 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, 200401011 + 200401012.

It is an arithmetic number, because the mean of its divisors is an integer number (200401012).

Almost surely, 2^400802023 is an apocalyptic number.

400802023 is a deficient number, since it is larger than the sum of its proper divisors (1).

400802023 is an equidigital number, since it uses as much as digits as its factorization.

400802023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 400802023 is about 20020.0405344245. The cubic root of 400802023 is about 737.2984172989.

The spelling of 400802023 in words is "four hundred million, eight hundred two thousand, twenty-three".