63961393 has 2 divisors, whose sum is σ = 63961394. Its totient is φ = 63961392.

The previous prime is 63961357. The next prime is 63961409. The reversal of 63961393 is 39316936.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59243809 + 4717584 = 7697^2 + 2172^2 .

It is a cyclic number.

It is not a de Polignac number, because 63961393 - 2¹⁷ = 63830321 is a prime.

It is not a weakly prime, because it can be changed into another prime (63961993) 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, 31980696 + 31980697.

It is an arithmetic number, because the mean of its divisors is an integer number (31980697).

Almost surely, 2^63961393 is an apocalyptic number.

It is an amenable number.

63961393 is a deficient number, since it is larger than the sum of its proper divisors (1).

63961393 is an equidigital number, since it uses as much as digits as its factorization.

63961393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 40.

The square root of 63961393 is about 7997.5866984985. The cubic root of 63961393 is about 399.9195525716.

The spelling of 63961393 in words is "sixty-three million, nine hundred sixty-one thousand, three hundred ninety-three".