63919 has 4 divisors (see below), whose sum is σ = 65520. Its totient is φ = 62320.

The previous prime is 63913. The next prime is 63929. The reversal of 63919 is 91936.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 63919 - 2¹¹ = 61871 is a prime.

It is a super-2 number, since 2×63919² = 8171277122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 739 + ... + 820.

It is an arithmetic number, because the mean of its divisors is an integer number (16380).

2⁶³⁹¹⁹ is an apocalyptic number.

63919 is a deficient number, since it is larger than the sum of its proper divisors (1601).

63919 is a wasteful number, since it uses less digits than its factorization.

63919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1600.

The product of its digits is 1458, while the sum is 28.

The square root of 63919 is about 252.8220718213. The cubic root of 63919 is about 39.9831178758.

It can be divided in two parts, 6391 and 9, that added together give a square (6400 = 80²).

The spelling of 63919 in words is "sixty-three thousand, nine hundred nineteen".