4990857 has 4 divisors (see below), whose sum is σ = 6654480. Its totient is φ = 3327236.

The previous prime is 4990849. The next prime is 4990891. The reversal of 4990857 is 7580994.

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 4990857 - 2³ = 4990849 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4990157) 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, 831807 + ... + 831812.

It is an arithmetic number, because the mean of its divisors is an integer number (1663620).

Almost surely, 2^4990857 is an apocalyptic number.

It is an amenable number.

4990857 is a deficient number, since it is larger than the sum of its proper divisors (1663623).

4990857 is a wasteful number, since it uses less digits than its factorization.

4990857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663622.

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

The square root of 4990857 is about 2234.0226050781. The cubic root of 4990857 is about 170.8933023383.

The spelling of 4990857 in words is "four million, nine hundred ninety thousand, eight hundred fifty-seven".