439375997 has 2 divisors, whose sum is σ = 439375998. Its totient is φ = 439375996.

The previous prime is 439375991. The next prime is 439376023. The reversal of 439375997 is 799573934.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271129156 + 168246841 = 16466^2 + 12971^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-439375997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439375991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219687998 + 219687999.

It is an arithmetic number, because the mean of its divisors is an integer number (219687999).

Almost surely, 2^439375997 is an apocalyptic number.

It is an amenable number.

439375997 is a deficient number, since it is larger than the sum of its proper divisors (1).

439375997 is an equidigital number, since it uses as much as digits as its factorization.

439375997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6429780, while the sum is 56.

The square root of 439375997 is about 20961.2975981927. The cubic root of 439375997 is about 760.2307684490.

The spelling of 439375997 in words is "four hundred thirty-nine million, three hundred seventy-five thousand, nine hundred ninety-seven".