63780913 has 4 divisors (see below), whose sum is σ = 72892480. Its totient is φ = 54669348.

The previous prime is 63780907. The next prime is 63780943. The reversal of 63780913 is 31908736.

63780913 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 63780913 - 2⁹ = 63780401 is a prime.

It is a super-2 number, since 2×63780913² = 8136009726227138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63780943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4555773 + ... + 4555786.

It is an arithmetic number, because the mean of its divisors is an integer number (18223120).

Almost surely, 2^63780913 is an apocalyptic number.

It is an amenable number.

63780913 is a deficient number, since it is larger than the sum of its proper divisors (9111567).

63780913 is an equidigital number, since it uses as much as digits as its factorization.

63780913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111566.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 63780913 is about 7986.2953238658. The cubic root of 63780913 is about 399.5430469335.

The spelling of 63780913 in words is "sixty-three million, seven hundred eighty thousand, nine hundred thirteen".