406441769 has 2 divisors, whose sum is σ = 406441770. Its totient is φ = 406441768.

The previous prime is 406441723. The next prime is 406441799. The reversal of 406441769 is 967144604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 396487744 + 9954025 = 19912^2 + 3155^2 .

It is a cyclic number.

It is not a de Polignac number, because 406441769 - 2¹⁶ = 406376233 is a prime.

It is a super-2 number, since 2×406441769² = 330389823175698722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (406441799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203220884 + 203220885.

It is an arithmetic number, because the mean of its divisors is an integer number (203220885).

Almost surely, 2^406441769 is an apocalyptic number.

It is an amenable number.

406441769 is a deficient number, since it is larger than the sum of its proper divisors (1).

406441769 is an equidigital number, since it uses as much as digits as its factorization.

406441769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 406441769 is about 20160.4010128767. The cubic root of 406441769 is about 740.7405351613.

The spelling of 406441769 in words is "four hundred six million, four hundred forty-one thousand, seven hundred sixty-nine".