438709057 has 2 divisors, whose sum is σ = 438709058. Its totient is φ = 438709056.

The previous prime is 438709001. The next prime is 438709087. The reversal of 438709057 is 750907834.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 385768881 + 52940176 = 19641^2 + 7276^2 .

It is a cyclic number.

It is not a de Polignac number, because 438709057 - 2¹⁵ = 438676289 is a prime.

It is not a weakly prime, because it can be changed into another prime (438709087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219354528 + 219354529.

It is an arithmetic number, because the mean of its divisors is an integer number (219354529).

Almost surely, 2^438709057 is an apocalyptic number.

It is an amenable number.

438709057 is a deficient number, since it is larger than the sum of its proper divisors (1).

438709057 is an equidigital number, since it uses as much as digits as its factorization.

438709057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 438709057 is about 20945.3827131423. The cubic root of 438709057 is about 759.8459157849.

The spelling of 438709057 in words is "four hundred thirty-eight million, seven hundred nine thousand, fifty-seven".