4857949 has 2 divisors, whose sum is σ = 4857950. Its totient is φ = 4857948.

The previous prime is 4857943. The next prime is 4857953. The reversal of 4857949 is 9497584.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4284900 + 573049 = 2070^2 + 757^2 .

It is a cyclic number.

It is not a de Polignac number, because 4857949 - 2¹¹ = 4855901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4857899 and 4857908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4857943) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2428974 + 2428975.

It is an arithmetic number, because the mean of its divisors is an integer number (2428975).

Almost surely, 2^4857949 is an apocalyptic number.

It is an amenable number.

4857949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4857949 is an equidigital number, since it uses as much as digits as its factorization.

4857949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 4857949 is about 2204.0755431700. The cubic root of 4857949 is about 169.3626538842.

The spelling of 4857949 in words is "four million, eight hundred fifty-seven thousand, nine hundred forty-nine".