639362241 has 60 divisors (see below), whose sum is σ = 1138418820. Its totient is φ = 356348160.

The previous prime is 639362201. The next prime is 639362309. The reversal of 639362241 is 142263936.

It can be written as a sum of positive squares in 2 ways, for example, as 57153600 + 582208641 = 7560^2 + 24129^2 .

It is not a de Polignac number, because 639362241 - 2¹³ = 639354049 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 639362196 and 639362205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639362201) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 160765 + ... + 164693.

It is an arithmetic number, because the mean of its divisors is an integer number (18973647).

Almost surely, 2^639362241 is an apocalyptic number.

It is an amenable number.

639362241 is a deficient number, since it is larger than the sum of its proper divisors (499056579).

639362241 is a wasteful number, since it uses less digits than its factorization.

639362241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996 (or 3980 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 639362241 is about 25285.6133206217. The cubic root of 639362241 is about 861.4875287698.

The spelling of 639362241 in words is "six hundred thirty-nine million, three hundred sixty-two thousand, two hundred forty-one".