63909413 has 2 divisors, whose sum is σ = 63909414. Its totient is φ = 63909412.

The previous prime is 63909403. The next prime is 63909421. The reversal of 63909413 is 31490936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62758084 + 1151329 = 7922^2 + 1073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63909413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63909403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31954706 + 31954707.

It is an arithmetic number, because the mean of its divisors is an integer number (31954707).

Almost surely, 2^63909413 is an apocalyptic number.

It is an amenable number.

63909413 is a deficient number, since it is larger than the sum of its proper divisors (1).

63909413 is an equidigital number, since it uses as much as digits as its factorization.

63909413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 63909413 is about 7994.3363076618. The cubic root of 63909413 is about 399.8111879724.

The spelling of 63909413 in words is "sixty-three million, nine hundred nine thousand, four hundred thirteen".