591979 has 4 divisors (see below), whose sum is σ = 597520. Its totient is φ = 586440.

The previous prime is 591973. The next prime is 592019. The reversal of 591979 is 979195.

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 591979 - 2¹⁵ = 559211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (591973) 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, 2607 + ... + 2824.

It is an arithmetic number, because the mean of its divisors is an integer number (149380).

2⁵⁹¹⁹⁷⁹ is an apocalyptic number.

591979 is a deficient number, since it is larger than the sum of its proper divisors (5541).

591979 is a wasteful number, since it uses less digits than its factorization.

591979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5540.

The product of its digits is 25515, while the sum is 40.

The square root of 591979 is about 769.4017156207. The cubic root of 591979 is about 83.9657362146.

The spelling of 591979 in words is "five hundred ninety-one thousand, nine hundred seventy-nine".