4989857 has 8 divisors (see below), whose sum is σ = 5426856. Its totient is φ = 4568832.

The previous prime is 4989851. The next prime is 4989863. The reversal of 4989857 is 7589894.

It is an interprime number because it is at equal distance from previous prime (4989851) and next prime (4989863).

It can be written as a sum of positive squares in 4 ways, for example, as 1860496 + 3129361 = 1364^2 + 1769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4989857 - 2⁴ = 4989841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4989851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3338 + ... + 4595.

It is an arithmetic number, because the mean of its divisors is an integer number (678357).

Almost surely, 2^4989857 is an apocalyptic number.

It is an amenable number.

4989857 is a deficient number, since it is larger than the sum of its proper divisors (436999).

4989857 is a wasteful number, since it uses less digits than its factorization.

4989857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7987.

The product of its digits is 725760, while the sum is 50.

The square root of 4989857 is about 2233.7987823437. The cubic root of 4989857 is about 170.8818878179.

The spelling of 4989857 in words is "four million, nine hundred eighty-nine thousand, eight hundred fifty-seven".