63729943 has 2 divisors, whose sum is σ = 63729944. Its totient is φ = 63729942.

The previous prime is 63729937. The next prime is 63729959. The reversal of 63729943 is 34992736.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63729943 - 2⁹ = 63729431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63729943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63729983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31864971 + 31864972.

It is an arithmetic number, because the mean of its divisors is an integer number (31864972).

Almost surely, 2^63729943 is an apocalyptic number.

63729943 is a deficient number, since it is larger than the sum of its proper divisors (1).

63729943 is an equidigital number, since it uses as much as digits as its factorization.

63729943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 43.

The square root of 63729943 is about 7983.1035944675. The cubic root of 63729943 is about 399.4365880400.

The spelling of 63729943 in words is "sixty-three million, seven hundred twenty-nine thousand, nine hundred forty-three".