4909857 has 4 divisors (see below), whose sum is σ = 6546480. Its totient is φ = 3273236.

The previous prime is 4909843. The next prime is 4909859. The reversal of 4909857 is 7589094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4909857 - 2⁴ = 4909841 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4909859) 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, 818307 + ... + 818312.

It is an arithmetic number, because the mean of its divisors is an integer number (1636620).

Almost surely, 2^4909857 is an apocalyptic number.

It is an amenable number.

4909857 is a deficient number, since it is larger than the sum of its proper divisors (1636623).

4909857 is a wasteful number, since it uses less digits than its factorization.

4909857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636622.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 4909857 is about 2215.8197128828. The cubic root of 4909857 is about 169.9637408251.

The spelling of 4909857 in words is "four million, nine hundred nine thousand, eight hundred fifty-seven".