4659991 has 4 divisors (see below), whose sum is σ = 5325712. Its totient is φ = 3994272.

The previous prime is 4659979. The next prime is 4660001. The reversal of 4659991 is 1999564.

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 4659991 - 2¹⁵ = 4627223 is a prime.

It is a super-2 number, since 2×4659991² = 43431032240162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4659901) 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, 332850 + ... + 332863.

It is an arithmetic number, because the mean of its divisors is an integer number (1331428).

Almost surely, 2^4659991 is an apocalyptic number.

4659991 is a deficient number, since it is larger than the sum of its proper divisors (665721).

4659991 is an equidigital number, since it uses as much as digits as its factorization.

4659991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665720.

The product of its digits is 87480, while the sum is 43.

The square root of 4659991 is about 2158.7012299065. The cubic root of 4659991 is about 167.0302095540.

The spelling of 4659991 in words is "four million, six hundred fifty-nine thousand, nine hundred ninety-one".