63711643 has 2 divisors, whose sum is σ = 63711644. Its totient is φ = 63711642.

The previous prime is 63711607. The next prime is 63711673. The reversal of 63711643 is 34611736.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63711643 - 2²¹ = 61614491 is a prime.

It is not a weakly prime, because it can be changed into another prime (63711673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31855821 + 31855822.

It is an arithmetic number, because the mean of its divisors is an integer number (31855822).

Almost surely, 2^63711643 is an apocalyptic number.

63711643 is a deficient number, since it is larger than the sum of its proper divisors (1).

63711643 is an equidigital number, since it uses as much as digits as its factorization.

63711643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 31.

The square root of 63711643 is about 7981.9573414044. The cubic root of 63711643 is about 399.3983517522.

The spelling of 63711643 in words is "sixty-three million, seven hundred eleven thousand, six hundred forty-three".