408769 has 2 divisors, whose sum is σ = 408770. Its totient is φ = 408768.

The previous prime is 408763. The next prime is 408773. The reversal of 408769 is 967804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 374544 + 34225 = 612^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 408769 - 2¹⁵ = 376001 is a prime.

It is a super-2 number, since 2×408769² = 334184190722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (408763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204384 + 204385.

It is an arithmetic number, because the mean of its divisors is an integer number (204385).

2⁴⁰⁸⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

408769 is a deficient number, since it is larger than the sum of its proper divisors (1).

408769 is an equidigital number, since it uses as much as digits as its factorization.

408769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 408769 is about 639.3504516304. The cubic root of 408769 is about 74.2151638932.

The spelling of 408769 in words is "four hundred eight thousand, seven hundred sixty-nine".