63943951 has 2 divisors, whose sum is σ = 63943952. Its totient is φ = 63943950.

The previous prime is 63943907. The next prime is 63943961. The reversal of 63943951 is 15934936.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63943951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63943961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31971975 + 31971976.

It is an arithmetic number, because the mean of its divisors is an integer number (31971976).

Almost surely, 2^63943951 is an apocalyptic number.

63943951 is a deficient number, since it is larger than the sum of its proper divisors (1).

63943951 is an equidigital number, since it uses as much as digits as its factorization.

63943951 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 63943951 is about 7996.4961701985. The cubic root of 63943951 is about 399.8831971461.

The spelling of 63943951 in words is "sixty-three million, nine hundred forty-three thousand, nine hundred fifty-one".