440669 has 2 divisors, whose sum is σ = 440670. Its totient is φ = 440668.

The previous prime is 440653. The next prime is 440677. The reversal of 440669 is 966044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344569 + 96100 = 587^2 + 310^2 .

It is a cyclic number.

It is not a de Polignac number, because 440669 - 2⁴ = 440653 is a prime.

It is a super-2 number, since 2×440669² = 388378335122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220334 + 220335.

It is an arithmetic number, because the mean of its divisors is an integer number (220335).

2⁴⁴⁰⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

440669 is a deficient number, since it is larger than the sum of its proper divisors (1).

440669 is an equidigital number, since it uses as much as digits as its factorization.

440669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 440669 is about 663.8290442576. The cubic root of 440669 is about 76.0975778039.

The spelling of 440669 in words is "four hundred forty thousand, six hundred sixty-nine".