4961909 has 4 divisors (see below), whose sum is σ = 5253804. Its totient is φ = 4670016.

The previous prime is 4961903. The next prime is 4961917. The reversal of 4961909 is 9091694.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2815684 + 2146225 = 1678^2 + 1465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4961909 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4961903) 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, 145922 + ... + 145955.

It is an arithmetic number, because the mean of its divisors is an integer number (1313451).

Almost surely, 2^4961909 is an apocalyptic number.

It is an amenable number.

4961909 is a deficient number, since it is larger than the sum of its proper divisors (291895).

4961909 is a wasteful number, since it uses less digits than its factorization.

4961909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291894.

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 4961909 is about 2227.5342870537. The cubic root of 4961909 is about 170.5622559981.

The spelling of 4961909 in words is "four million, nine hundred sixty-one thousand, nine hundred nine".