63381943 has 2 divisors, whose sum is σ = 63381944. Its totient is φ = 63381942.

The previous prime is 63381911. The next prime is 63381947. The reversal of 63381943 is 34918336.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63381943 - 2⁵ = 63381911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63381947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31690971 + 31690972.

It is an arithmetic number, because the mean of its divisors is an integer number (31690972).

Almost surely, 2^63381943 is an apocalyptic number.

63381943 is a deficient number, since it is larger than the sum of its proper divisors (1).

63381943 is an equidigital number, since it uses as much as digits as its factorization.

63381943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 37.

The square root of 63381943 is about 7961.2777240842. The cubic root of 63381943 is about 398.7082139630.

It can be divided in two parts, 6338 and 1943, that added together give a square (8281 = 91²).

The spelling of 63381943 in words is "sixty-three million, three hundred eighty-one thousand, nine hundred forty-three".