439684313 has 2 divisors, whose sum is σ = 439684314. Its totient is φ = 439684312.

The previous prime is 439684291. The next prime is 439684321. The reversal of 439684313 is 313486934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426339904 + 13344409 = 20648^2 + 3653^2 .

It is a cyclic number.

It is not a de Polignac number, because 439684313 - 2⁸ = 439684057 is a prime.

It is not a weakly prime, because it can be changed into another prime (439684363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219842156 + 219842157.

It is an arithmetic number, because the mean of its divisors is an integer number (219842157).

Almost surely, 2^439684313 is an apocalyptic number.

It is an amenable number.

439684313 is a deficient number, since it is larger than the sum of its proper divisors (1).

439684313 is an equidigital number, since it uses as much as digits as its factorization.

439684313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 439684313 is about 20968.6507195861. The cubic root of 439684313 is about 760.4085482302.

The spelling of 439684313 in words is "four hundred thirty-nine million, six hundred eighty-four thousand, three hundred thirteen".