4657991 has 8 divisors (see below), whose sum is σ = 5102160. Its totient is φ = 4226112.

The previous prime is 4657987. The next prime is 4657997. The reversal of 4657991 is 1997564.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4657991 - 2² = 4657987 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 (4657997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2270 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (637770).

Almost surely, 2^4657991 is an apocalyptic number.

4657991 is a deficient number, since it is larger than the sum of its proper divisors (444169).

4657991 is a wasteful number, since it uses less digits than its factorization.

4657991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145.

The product of its digits is 68040, while the sum is 41.

The square root of 4657991 is about 2158.2379386898. The cubic root of 4657991 is about 167.0063104934.

The spelling of 4657991 in words is "four million, six hundred fifty-seven thousand, nine hundred ninety-one".