406071769 has 2 divisors, whose sum is σ = 406071770. Its totient is φ = 406071768.

The previous prime is 406071733. The next prime is 406071797. The reversal of 406071769 is 967170604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 403527744 + 2544025 = 20088^2 + 1595^2 .

It is a cyclic number.

It is not a de Polignac number, because 406071769 - 2⁷ = 406071641 is a prime.

It is a super-2 number, since 2×406071769² = 329788563157578722, which contains 22 as substring.

It is equal to p_21642799 and since 406071769 and 21642799 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (406071709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203035884 + 203035885.

It is an arithmetic number, because the mean of its divisors is an integer number (203035885).

Almost surely, 2^406071769 is an apocalyptic number.

It is an amenable number.

406071769 is a deficient number, since it is larger than the sum of its proper divisors (1).

406071769 is an equidigital number, since it uses as much as digits as its factorization.

406071769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 406071769 is about 20151.2225187456. Note that the first 3 decimals coincide. The cubic root of 406071769 is about 740.5156917948.

The spelling of 406071769 in words is "four hundred six million, seventy-one thousand, seven hundred sixty-nine".