63994 has 12 divisors (see below), whose sum is σ = 111834. Its totient is φ = 27384.

The previous prime is 63977. The next prime is 63997. The reversal of 63994 is 49936.

It can be written as a sum of positive squares in only one way, i.e., 60025 + 3969 = 245^2 + 63^2 .

It is not an unprimeable number, because it can be changed into a prime (63997) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 229 + ... + 424.

63994 is a Friedman number, since it can be written as (49-9)^3-6, using all its digits and the basic arithmetic operations.

2⁶³⁹⁹⁴ is an apocalyptic number.

63994 is a deficient number, since it is larger than the sum of its proper divisors (47840).

63994 is a wasteful number, since it uses less digits than its factorization.

63994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669 (or 662 counting only the distinct ones).

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

The square root of 63994 is about 252.9703539943. The cubic root of 63994 is about 39.9987499609.

The spelling of 63994 in words is "sixty-three thousand, nine hundred ninety-four".