4851949 has 2 divisors, whose sum is σ = 4851950. Its totient is φ = 4851948.

The previous prime is 4851947. The next prime is 4851971. The reversal of 4851949 is 9491584.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4485924 + 366025 = 2118^2 + 605^2 .

It is a cyclic number.

It is not a de Polignac number, because 4851949 - 2¹ = 4851947 is a prime.

Together with 4851947, it forms a pair of twin primes.

4851949 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4851941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2425974 + 2425975.

It is an arithmetic number, because the mean of its divisors is an integer number (2425975).

Almost surely, 2^4851949 is an apocalyptic number.

It is an amenable number.

4851949 is a deficient number, since it is larger than the sum of its proper divisors (1).

4851949 is an equidigital number, since it uses as much as digits as its factorization.

4851949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 4851949 is about 2202.7140077641. The cubic root of 4851949 is about 169.2928991676.

The spelling of 4851949 in words is "four million, eight hundred fifty-one thousand, nine hundred forty-nine".