63913261 has 4 divisors (see below), whose sum is σ = 63930592. Its totient is φ = 63895932.

The previous prime is 63913259. The next prime is 63913271. The reversal of 63913261 is 16231936.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63913261 - 2¹ = 63913259 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63913211) 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 in 3 ways as a sum of consecutive naturals, for example, 681 + ... + 11326.

It is an arithmetic number, because the mean of its divisors is an integer number (15982648).

Almost surely, 2^63913261 is an apocalyptic number.

It is an amenable number.

63913261 is a deficient number, since it is larger than the sum of its proper divisors (17331).

63913261 is a wasteful number, since it uses less digits than its factorization.

63913261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17330.

The product of its digits is 5832, while the sum is 31.

The square root of 63913261 is about 7994.5769744246. The cubic root of 63913261 is about 399.8192120516.

The spelling of 63913261 in words is "sixty-three million, nine hundred thirteen thousand, two hundred sixty-one".