4949509 has 4 divisors (see below), whose sum is σ = 4962816. Its totient is φ = 4936204.

The previous prime is 4949501. The next prime is 4949521. The reversal of 4949509 is 9059494.

4949509 = T₁₈₁₅ + T₁₈₁₆ + T₁₈₁₇.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9059494 = 2 ⋅4529747.

It is a cyclic number.

It is not a de Polignac number, because 4949509 - 2³ = 4949501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4949501) 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, 6079 + ... + 6844.

It is an arithmetic number, because the mean of its divisors is an integer number (1240704).

Almost surely, 2^4949509 is an apocalyptic number.

4949509 is the 1817-th centered triangular number.

It is an amenable number.

4949509 is a deficient number, since it is larger than the sum of its proper divisors (13307).

4949509 is a wasteful number, since it uses less digits than its factorization.

4949509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13306.

The product of its (nonzero) digits is 58320, while the sum is 40.

The square root of 4949509 is about 2224.7491993481. The cubic root of 4949509 is about 170.4200569491.

The spelling of 4949509 in words is "four million, nine hundred forty-nine thousand, five hundred nine".