4997947 has 4 divisors (see below), whose sum is σ = 5170320. Its totient is φ = 4825576.

The previous prime is 4997929. The next prime is 4997981. The reversal of 4997947 is 7497994.

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

It is a cyclic number.

It is not a de Polignac number, because 4997947 - 2¹⁵ = 4965179 is a prime.

It is a Duffinian number.

4997947 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 4997947.

It is not an unprimeable number, because it can be changed into a prime (4997917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86143 + ... + 86200.

It is an arithmetic number, because the mean of its divisors is an integer number (1292580).

Almost surely, 2^4997947 is an apocalyptic number.

4997947 is a deficient number, since it is larger than the sum of its proper divisors (172373).

4997947 is a wasteful number, since it uses less digits than its factorization.

4997947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172372.

The product of its digits is 571536, while the sum is 49.

The square root of 4997947 is about 2235.6088656113. The cubic root of 4997947 is about 170.9741875929.

The spelling of 4997947 in words is "four million, nine hundred ninety-seven thousand, nine hundred forty-seven".