439608649 has 2 divisors, whose sum is σ = 439608650. Its totient is φ = 439608648.

The previous prime is 439608619. The next prime is 439608667. The reversal of 439608649 is 946806934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350438400 + 89170249 = 18720^2 + 9443^2 .

It is a cyclic number.

It is not a de Polignac number, because 439608649 - 2¹³ = 439600457 is a prime.

It is a super-3 number, since 3×439608649³ (a number of 27 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (439608619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219804324 + 219804325.

It is an arithmetic number, because the mean of its divisors is an integer number (219804325).

Almost surely, 2^439608649 is an apocalyptic number.

It is an amenable number.

439608649 is a deficient number, since it is larger than the sum of its proper divisors (1).

439608649 is an equidigital number, since it uses as much as digits as its factorization.

439608649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 439608649 is about 20966.8464247726. The cubic root of 439608649 is about 760.3649268929.

The spelling of 439608649 in words is "four hundred thirty-nine million, six hundred eight thousand, six hundred forty-nine".