1039638641 has 2 divisors, whose sum is σ = 1039638642. Its totient is φ = 1039638640.

The previous prime is 1039638583. The next prime is 1039638667. The reversal of 1039638641 is 1468369301.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 572214241 + 467424400 = 23921^2 + 21620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1039638641 - 2¹⁸ = 1039376497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1039638671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519819320 + 519819321.

It is an arithmetic number, because the mean of its divisors is an integer number (519819321).

Almost surely, 2^1039638641 is an apocalyptic number.

It is an amenable number.

1039638641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039638641 is an equidigital number, since it uses as much as digits as its factorization.

1039638641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 1039638641 is about 32243.4278729790. The cubic root of 1039638641 is about 1013.0420459097.

The spelling of 1039638641 in words is "one billion, thirty-nine million, six hundred thirty-eight thousand, six hundred forty-one".