4909661 has 4 divisors (see below), whose sum is σ = 4920000. Its totient is φ = 4899324.

The previous prime is 4909643. The next prime is 4909679. The reversal of 4909661 is 1669094.

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 an interprime number because it is at equal distance from previous prime (4909643) and next prime (4909679).

It is a cyclic number.

It is not a de Polignac number, because 4909661 - 2¹⁴ = 4893277 is a prime.

It is a super-2 number, since 2×4909661² = 48209542269842, which contains 22 as substring.

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 (4909601) 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, 4421 + ... + 5418.

It is an arithmetic number, because the mean of its divisors is an integer number (1230000).

Almost surely, 2^4909661 is an apocalyptic number.

It is an amenable number.

4909661 is a deficient number, since it is larger than the sum of its proper divisors (10339).

4909661 is an equidigital number, since it uses as much as digits as its factorization.

4909661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10338.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 4909661 is about 2215.7754850165. The cubic root of 4909661 is about 169.9614791614.

The spelling of 4909661 in words is "four million, nine hundred nine thousand, six hundred sixty-one".