4661891 has 4 divisors (see below), whose sum is σ = 5020512. Its totient is φ = 4303272.

The previous prime is 4661887. The next prime is 4661911. The reversal of 4661891 is 1981664.

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

It is a cyclic number.

It is not a de Polignac number, because 4661891 - 2² = 4661887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4661851) 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, 179291 + ... + 179316.

It is an arithmetic number, because the mean of its divisors is an integer number (1255128).

Almost surely, 2^4661891 is an apocalyptic number.

4661891 is a deficient number, since it is larger than the sum of its proper divisors (358621).

4661891 is a wasteful number, since it uses less digits than its factorization.

4661891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358620.

The product of its digits is 10368, while the sum is 35.

The square root of 4661891 is about 2159.1412644846. The cubic root of 4661891 is about 167.0529073286.

The spelling of 4661891 in words is "four million, six hundred sixty-one thousand, eight hundred ninety-one".