439207939 has 2 divisors, whose sum is σ = 439207940. Its totient is φ = 439207938.

The previous prime is 439207913. The next prime is 439207961. The reversal of 439207939 is 939702934.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439207939 is a prime.

It is a super-2 number, since 2×439207939² = 385807227361255442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (439297939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219603969 + 219603970.

It is an arithmetic number, because the mean of its divisors is an integer number (219603970).

Almost surely, 2^439207939 is an apocalyptic number.

439207939 is a deficient number, since it is larger than the sum of its proper divisors (1).

439207939 is an equidigital number, since it uses as much as digits as its factorization.

439207939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 367416, while the sum is 46.

The square root of 439207939 is about 20957.2884457890. The cubic root of 439207939 is about 760.1338285795.

The spelling of 439207939 in words is "four hundred thirty-nine million, two hundred seven thousand, nine hundred thirty-nine".