406023169 has 2 divisors, whose sum is σ = 406023170. Its totient is φ = 406023168.

The previous prime is 406023139. The next prime is 406023181. The reversal of 406023169 is 961320604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403809025 + 2214144 = 20095^2 + 1488^2 .

It is a cyclic number.

It is not a de Polignac number, because 406023169 - 2²³ = 397634561 is a prime.

It is a super-2 number, since 2×406023169² = 329709627529605122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 406023169.

It is not a weakly prime, because it can be changed into another prime (406023139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203011584 + 203011585.

It is an arithmetic number, because the mean of its divisors is an integer number (203011585).

Almost surely, 2^406023169 is an apocalyptic number.

It is an amenable number.

406023169 is a deficient number, since it is larger than the sum of its proper divisors (1).

406023169 is an equidigital number, since it uses as much as digits as its factorization.

406023169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 406023169 is about 20150.0166004894. The cubic root of 406023169 is about 740.4861481679.

The spelling of 406023169 in words is "four hundred six million, twenty-three thousand, one hundred sixty-nine".