63381709 has 4 divisors (see below), whose sum is σ = 64730304. Its totient is φ = 62033116.

The previous prime is 63381697. The next prime is 63381713. The reversal of 63381709 is 90718336.

63381709 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 63381709 - 2⁷ = 63381581 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 (66381709) 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, 674227 + ... + 674320.

It is an arithmetic number, because the mean of its divisors is an integer number (16182576).

Almost surely, 2^63381709 is an apocalyptic number.

It is an amenable number.

63381709 is a deficient number, since it is larger than the sum of its proper divisors (1348595).

63381709 is a wasteful number, since it uses less digits than its factorization.

63381709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348594.

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

The square root of 63381709 is about 7961.2630279372. The cubic root of 63381709 is about 398.7077232983.

The spelling of 63381709 in words is "sixty-three million, three hundred eighty-one thousand, seven hundred nine".