63509393 has 2 divisors, whose sum is σ = 63509394. Its totient is φ = 63509392.

The previous prime is 63509389. The next prime is 63509401. The reversal of 63509393 is 39390536.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57638464 + 5870929 = 7592^2 + 2423^2 .

It is a cyclic number.

It is not a de Polignac number, because 63509393 - 2² = 63509389 is a prime.

It is not a weakly prime, because it can be changed into another prime (63502393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31754696 + 31754697.

It is an arithmetic number, because the mean of its divisors is an integer number (31754697).

Almost surely, 2^63509393 is an apocalyptic number.

It is an amenable number.

63509393 is a deficient number, since it is larger than the sum of its proper divisors (1).

63509393 is an equidigital number, since it uses as much as digits as its factorization.

63509393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65610, while the sum is 38.

The square root of 63509393 is about 7969.2780726989. The cubic root of 63509393 is about 398.9752791932.

The spelling of 63509393 in words is "sixty-three million, five hundred nine thousand, three hundred ninety-three".