63106691 has 2 divisors, whose sum is σ = 63106692. Its totient is φ = 63106690.

The previous prime is 63106661. The next prime is 63106709. The reversal of 63106691 is 19660136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63106691 - 2⁶ = 63106627 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63106661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31553345 + 31553346.

It is an arithmetic number, because the mean of its divisors is an integer number (31553346).

Almost surely, 2^63106691 is an apocalyptic number.

63106691 is a deficient number, since it is larger than the sum of its proper divisors (1).

63106691 is an equidigital number, since it uses as much as digits as its factorization.

63106691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 63106691 is about 7943.9719913907. The cubic root of 63106691 is about 398.1302129429.

The spelling of 63106691 in words is "sixty-three million, one hundred six thousand, six hundred ninety-one".