4998991 has 8 divisors (see below), whose sum is σ = 5201280. Its totient is φ = 4798752.

The previous prime is 4998989. The next prime is 4998997. The reversal of 4998991 is 1998994.

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 4998991 - 2¹ = 4998989 is a prime.

It is a super-2 number, since 2×4998991² = 49979822036162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4998997) 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, 6081 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (650160).

Almost surely, 2^4998991 is an apocalyptic number.

4998991 is a deficient number, since it is larger than the sum of its proper divisors (202289).

4998991 is a wasteful number, since it uses less digits than its factorization.

4998991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025.

The product of its digits is 209952, while the sum is 49.

The square root of 4998991 is about 2235.8423468572. The cubic root of 4998991 is about 170.9860914557.

The spelling of 4998991 in words is "four million, nine hundred ninety-eight thousand, nine hundred ninety-one".