400806023 has 2 divisors, whose sum is σ = 400806024. Its totient is φ = 400806022.

The previous prime is 400806011. The next prime is 400806047. The reversal of 400806023 is 320608004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 400806023 - 2⁶ = 400805959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400806023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400802023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200403011 + 200403012.

It is an arithmetic number, because the mean of its divisors is an integer number (200403012).

Almost surely, 2^400806023 is an apocalyptic number.

400806023 is a deficient number, since it is larger than the sum of its proper divisors (1).

400806023 is an equidigital number, since it uses as much as digits as its factorization.

400806023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 400806023 is about 20020.1404340729. The cubic root of 400806023 is about 737.3008700343.

The spelling of 400806023 in words is "four hundred million, eight hundred six thousand, twenty-three".