4779989 has 2 divisors, whose sum is σ = 4779990. Its totient is φ = 4779988.

The previous prime is 4779979. The next prime is 4779991. The reversal of 4779989 is 9899774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4695889 + 84100 = 2167^2 + 290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4779989 is a prime.

Together with 4779991, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4779989.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4779949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2389994 + 2389995.

It is an arithmetic number, because the mean of its divisors is an integer number (2389995).

Almost surely, 2^4779989 is an apocalyptic number.

It is an amenable number.

4779989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4779989 is an equidigital number, since it uses as much as digits as its factorization.

4779989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 53.

The square root of 4779989 is about 2186.3185952647. The cubic root of 4779989 is about 168.4517908381.

The spelling of 4779989 in words is "four million, seven hundred seventy-nine thousand, nine hundred eighty-nine".