4391691 has 4 divisors (see below), whose sum is σ = 5855592. Its totient is φ = 2927792.

The previous prime is 4391687. The next prime is 4391707. The reversal of 4391691 is 1961934.

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 4391691 - 2² = 4391687 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (4391671) 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, 731946 + ... + 731951.

It is an arithmetic number, because the mean of its divisors is an integer number (1463898).

Almost surely, 2^4391691 is an apocalyptic number.

4391691 is a deficient number, since it is larger than the sum of its proper divisors (1463901).

4391691 is a wasteful number, since it uses less digits than its factorization.

4391691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463900.

The product of its digits is 5832, while the sum is 33.

The square root of 4391691 is about 2095.6361802565. The cubic root of 4391691 is about 163.7610415413.

The spelling of 4391691 in words is "four million, three hundred ninety-one thousand, six hundred ninety-one".