4999978 has 4 divisors (see below), whose sum is σ = 7499970. Its totient is φ = 2499988.

The previous prime is 4999963. The next prime is 4999999. The reversal of 4999978 is 8799994.

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., 4986289 + 13689 = 2233^2 + 117^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249993 + ... + 1249996.

Almost surely, 2^4999978 is an apocalyptic number.

4999978 is a deficient number, since it is larger than the sum of its proper divisors (2499992).

4999978 is a wasteful number, since it uses less digits than its factorization.

4999978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2499991.

The product of its digits is 1469664, while the sum is 55.

The square root of 4999978 is about 2236.0630581448. The cubic root of 4999978 is about 170.9973438708.

It can be divided in two parts, 499997 and 8, that added together give a palindrome (500005).

The spelling of 4999978 in words is "four million, nine hundred ninety-nine thousand, nine hundred seventy-eight".