4999857 has 4 divisors (see below), whose sum is σ = 6666480. Its totient is φ = 3333236.

The previous prime is 4999849. The next prime is 4999867. The reversal of 4999857 is 7589994.

It is a happy number.

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 4999857 - 2³ = 4999849 is a prime.

It is a d-powerful number, because it can be written as 4⁸ + 9² + 9³ + 9⁷ + 8⁵ + 5³ + 7⁶ .

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4999867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 833307 + ... + 833312.

It is an arithmetic number, because the mean of its divisors is an integer number (1666620).

Almost surely, 2^4999857 is an apocalyptic number.

It is an amenable number.

4999857 is a deficient number, since it is larger than the sum of its proper divisors (1666623).

4999857 is a wasteful number, since it uses less digits than its factorization.

4999857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666622.

The product of its digits is 816480, while the sum is 51.

The square root of 4999857 is about 2236.0360014991. The cubic root of 4999857 is about 170.9959644751.

The spelling of 4999857 in words is "four million, nine hundred ninety-nine thousand, eight hundred fifty-seven".