63725143 has 2 divisors, whose sum is σ = 63725144. Its totient is φ = 63725142.

The previous prime is 63725117. The next prime is 63725147. The reversal of 63725143 is 34152736.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63725143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63725147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31862571 + 31862572.

It is an arithmetic number, because the mean of its divisors is an integer number (31862572).

Almost surely, 2^63725143 is an apocalyptic number.

63725143 is a deficient number, since it is larger than the sum of its proper divisors (1).

63725143 is an equidigital number, since it uses as much as digits as its factorization.

63725143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 63725143 is about 7982.8029538502. The cubic root of 63725143 is about 399.4265595580.

Adding to 63725143 its reverse (34152736), we get a palindrome (97877879).

The spelling of 63725143 in words is "sixty-three million, seven hundred twenty-five thousand, one hundred forty-three".