439880869 has 2 divisors, whose sum is σ = 439880870. Its totient is φ = 439880868.

The previous prime is 439880851. The next prime is 439880891. The reversal of 439880869 is 968088934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424772100 + 15108769 = 20610^2 + 3887^2 .

It is a cyclic number.

It is not a de Polignac number, because 439880869 - 2¹⁷ = 439749797 is a prime.

It is a super-2 number, since 2×439880869² = 386990357824390322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439880369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219940434 + 219940435.

It is an arithmetic number, because the mean of its divisors is an integer number (219940435).

Almost surely, 2^439880869 is an apocalyptic number.

It is an amenable number.

439880869 is a deficient number, since it is larger than the sum of its proper divisors (1).

439880869 is an equidigital number, since it uses as much as digits as its factorization.

439880869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2985984, while the sum is 55.

The square root of 439880869 is about 20973.3370973720. The cubic root of 439880869 is about 760.5218420881.

The spelling of 439880869 in words is "four hundred thirty-nine million, eight hundred eighty thousand, eight hundred sixty-nine".