63906529 has 2 divisors, whose sum is σ = 63906530. Its totient is φ = 63906528.

The previous prime is 63906509. The next prime is 63906533. The reversal of 63906529 is 92560936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54420129 + 9486400 = 7377^2 + 3080^2 .

It is a cyclic number.

It is not a de Polignac number, because 63906529 - 2²³ = 55517921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63906491 and 63906500.

It is not a weakly prime, because it can be changed into another prime (63906509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31953264 + 31953265.

It is an arithmetic number, because the mean of its divisors is an integer number (31953265).

Almost surely, 2^63906529 is an apocalyptic number.

It is an amenable number.

63906529 is a deficient number, since it is larger than the sum of its proper divisors (1).

63906529 is an equidigital number, since it uses as much as digits as its factorization.

63906529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 40.

The square root of 63906529 is about 7994.1559279263. The cubic root of 63906529 is about 399.8051738724.

The spelling of 63906529 in words is "sixty-three million, nine hundred six thousand, five hundred twenty-nine".