4989949 has 2 divisors, whose sum is σ = 4989950. Its totient is φ = 4989948.

The previous prime is 4989947. The next prime is 4989953. The reversal of 4989949 is 9499894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 1909924 = 1755^2 + 1382^2 .

It is a cyclic number.

It is not a de Polignac number, because 4989949 - 2¹ = 4989947 is a prime.

Together with 4989947, it forms a pair of twin primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4989896 and 4989905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4989947) 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, 2494974 + 2494975.

It is an arithmetic number, because the mean of its divisors is an integer number (2494975).

Almost surely, 2^4989949 is an apocalyptic number.

It is an amenable number.

4989949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989949 is an equidigital number, since it uses as much as digits as its factorization.

4989949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 52.

The square root of 4989949 is about 2233.8193749719. The cubic root of 4989949 is about 170.8829380174.

It can be divided in two parts, 49 and 89949, that added together give a palindrome (89998).

The spelling of 4989949 in words is "four million, nine hundred eighty-nine thousand, nine hundred forty-nine".