4949869 has 4 divisors (see below), whose sum is σ = 4968540. Its totient is φ = 4931200.

The previous prime is 4949843. The next prime is 4949881. The reversal of 4949869 is 9689494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9689494 = 2 ⋅4844747.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 3822025 = 1062^2 + 1955^2 .

It is a cyclic number.

It is not a de Polignac number, because 4949869 - 2⁵ = 4949837 is a prime.

It is a super-2 number, since 2×4949869² = 49002406234322, which contains 22 as substring.

It is a Duffinian number.

4949869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4949369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8932 + ... + 9469.

It is an arithmetic number, because the mean of its divisors is an integer number (1242135).

Almost surely, 2^4949869 is an apocalyptic number.

It is an amenable number.

4949869 is a deficient number, since it is larger than the sum of its proper divisors (18671).

4949869 is a wasteful number, since it uses less digits than its factorization.

4949869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18670.

The product of its digits is 559872, while the sum is 49.

The square root of 4949869 is about 2224.8301058733. The cubic root of 4949869 is about 170.4241886540.

The spelling of 4949869 in words is "four million, nine hundred forty-nine thousand, eight hundred sixty-nine".