4639994 has 4 divisors (see below), whose sum is σ = 6959994. Its totient is φ = 2319996.

The previous prime is 4639993. The next prime is 4640003. The reversal of 4639994 is 4999364.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 4264225 + 375769 = 2065^2 + 613^2 .

It is not an unprimeable number, because it can be changed into a prime (4639993) 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 as a sum of consecutive naturals, namely, 1159997 + ... + 1160000.

Almost surely, 2^4639994 is an apocalyptic number.

4639994 is a deficient number, since it is larger than the sum of its proper divisors (2320000).

4639994 is a wasteful number, since it uses less digits than its factorization.

4639994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319999.

The product of its digits is 209952, while the sum is 44.

The square root of 4639994 is about 2154.0645301383. The cubic root of 4639994 is about 166.7909464153.

The spelling of 4639994 in words is "four million, six hundred thirty-nine thousand, nine hundred ninety-four".