4911591 has 4 divisors (see below), whose sum is σ = 6548792. Its totient is φ = 3274392.

The previous prime is 4911551. The next prime is 4911593. The reversal of 4911591 is 1951194.

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

It is not a de Polignac number, because 4911591 - 2⁷ = 4911463 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4911593) 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, 818596 + ... + 818601.

It is an arithmetic number, because the mean of its divisors is an integer number (1637198).

Almost surely, 2^4911591 is an apocalyptic number.

4911591 is a deficient number, since it is larger than the sum of its proper divisors (1637201).

4911591 is a wasteful number, since it uses less digits than its factorization.

4911591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1637200.

The product of its digits is 1620, while the sum is 30.

The square root of 4911591 is about 2216.2109556628. The cubic root of 4911591 is about 169.9837470044.

The spelling of 4911591 in words is "four million, nine hundred eleven thousand, five hundred ninety-one".