400622023 has 2 divisors, whose sum is σ = 400622024. Its totient is φ = 400622022.

The previous prime is 400622009. The next prime is 400622039. The reversal of 400622023 is 320226004.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400622023 is a prime.

It is a super-2 number, since 2×400622023² = 320996010625225058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (400620023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200311011 + 200311012.

It is an arithmetic number, because the mean of its divisors is an integer number (200311012).

Almost surely, 2^400622023 is an apocalyptic number.

400622023 is a deficient number, since it is larger than the sum of its proper divisors (1).

400622023 is an equidigital number, since it uses as much as digits as its factorization.

400622023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 400622023 is about 20015.5445341864. The cubic root of 400622023 is about 737.1880273144.

Adding to 400622023 its reverse (320226004), we get a palindrome (720848027).

The spelling of 400622023 in words is "four hundred million, six hundred twenty-two thousand, twenty-three".