439985957 has 2 divisors, whose sum is σ = 439985958. Its totient is φ = 439985956.

The previous prime is 439985939. The next prime is 439985989. The reversal of 439985957 is 759589934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252460321 + 187525636 = 15889^2 + 13694^2 .

It is a cyclic number.

It is not a de Polignac number, because 439985957 - 2²⁰ = 438937381 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 439985896 and 439985905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439985927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219992978 + 219992979.

It is an arithmetic number, because the mean of its divisors is an integer number (219992979).

Almost surely, 2^439985957 is an apocalyptic number.

It is an amenable number.

439985957 is a deficient number, since it is larger than the sum of its proper divisors (1).

439985957 is an equidigital number, since it uses as much as digits as its factorization.

439985957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12247200, while the sum is 59.

The square root of 439985957 is about 20975.8422238536. The cubic root of 439985957 is about 760.5824004205.

The spelling of 439985957 in words is "four hundred thirty-nine million, nine hundred eighty-five thousand, nine hundred fifty-seven".