63921319 has 16 divisors (see below), whose sum is σ = 80315136. Its totient is φ = 49420800.

The previous prime is 63921293. The next prime is 63921329. The reversal of 63921319 is 91312936.

It is not a de Polignac number, because 63921319 - 2¹³ = 63913127 is a prime.

It is a super-2 number, since 2×63921319² = 8171870045399522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63921329) 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 15 ways as a sum of consecutive naturals, for example, 6919 + ... + 13255.

It is an arithmetic number, because the mean of its divisors is an integer number (5019696).

Almost surely, 2^63921319 is an apocalyptic number.

63921319 is a deficient number, since it is larger than the sum of its proper divisors (16393817).

63921319 is a wasteful number, since it uses less digits than its factorization.

63921319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6486.

The product of its digits is 8748, while the sum is 34.

The square root of 63921319 is about 7995.0809251689. The cubic root of 63921319 is about 399.8360140307.

The spelling of 63921319 in words is "sixty-three million, nine hundred twenty-one thousand, three hundred nineteen".