639053 has 2 divisors, whose sum is σ = 639054. Its totient is φ = 639052.

The previous prime is 639049. The next prime is 639083. The reversal of 639053 is 350936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 635209 + 3844 = 797^2 + 62^2 .

It is a cyclic number.

It is not a de Polignac number, because 639053 - 2² = 639049 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (639043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 319526 + 319527.

It is an arithmetic number, because the mean of its divisors is an integer number (319527).

2⁶³⁹⁰⁵³ is an apocalyptic number.

It is an amenable number.

639053 is a deficient number, since it is larger than the sum of its proper divisors (1).

639053 is an equidigital number, since it uses as much as digits as its factorization.

639053 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 639053 is about 799.4079058904. The cubic root of 639053 is about 86.1348614181.

Adding to 639053 its reverse (350936), we get a palindrome (989989).

The spelling of 639053 in words is "six hundred thirty-nine thousand, fifty-three".