63138631 has 2 divisors, whose sum is σ = 63138632. Its totient is φ = 63138630.

The previous prime is 63138583. The next prime is 63138671. The reversal of 63138631 is 13683136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63138631 - 2¹³ = 63130439 is a prime.

It is a super-2 number, since 2×63138631² = 7972973449108322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63138593 and 63138602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63138671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31569315 + 31569316.

It is an arithmetic number, because the mean of its divisors is an integer number (31569316).

Almost surely, 2^63138631 is an apocalyptic number.

63138631 is a deficient number, since it is larger than the sum of its proper divisors (1).

63138631 is an equidigital number, since it uses as much as digits as its factorization.

63138631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 31.

The square root of 63138631 is about 7945.9820664283. The cubic root of 63138631 is about 398.1973697639.

The spelling of 63138631 in words is "sixty-three million, one hundred thirty-eight thousand, six hundred thirty-one".