70591 has 4 divisors (see below), whose sum is σ = 71632. Its totient is φ = 69552.

The previous prime is 70589. The next prime is 70607. The reversal of 70591 is 19507.

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 70591 - 2¹ = 70589 is a prime.

It is a Duffinian number.

70591 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70501) 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 3 ways as a sum of consecutive naturals, for example, 411 + ... + 556.

It is an arithmetic number, because the mean of its divisors is an integer number (17908).

2⁷⁰⁵⁹¹ is an apocalyptic number.

70591 is a deficient number, since it is larger than the sum of its proper divisors (1041).

70591 is an equidigital number, since it uses as much as digits as its factorization.

70591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 315, while the sum is 22.

The square root of 70591 is about 265.6896685985. The cubic root of 70591 is about 41.3285128498.

The spelling of 70591 in words is "seventy thousand, five hundred ninety-one".