63644071 has 2 divisors, whose sum is σ = 63644072. Its totient is φ = 63644070.

The previous prime is 63644057. The next prime is 63644083. The reversal of 63644071 is 17044636.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63644071 - 2¹¹ = 63642023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63644011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31822035 + 31822036.

It is an arithmetic number, because the mean of its divisors is an integer number (31822036).

Almost surely, 2^63644071 is an apocalyptic number.

63644071 is a deficient number, since it is larger than the sum of its proper divisors (1).

63644071 is an equidigital number, since it uses as much as digits as its factorization.

63644071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 63644071 is about 7977.7234221299. The cubic root of 63644071 is about 399.2571023619.

The spelling of 63644071 in words is "sixty-three million, six hundred forty-four thousand, seventy-one".