966236591 has 4 divisors (see below), whose sum is σ = 966807000. Its totient is φ = 965666184.

The previous prime is 966236581. The next prime is 966236629. The reversal of 966236591 is 195632669.

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 966236591 - 2¹⁴ = 966220207 is a prime.

It is a super-2 number, since 2×966236591² = 1867226299574602562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (966236501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282656 + ... + 286053.

It is an arithmetic number, because the mean of its divisors is an integer number (241701750).

Almost surely, 2^966236591 is an apocalyptic number.

966236591 is a deficient number, since it is larger than the sum of its proper divisors (570409).

966236591 is a wasteful number, since it uses less digits than its factorization.

966236591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570408.

The product of its digits is 524880, while the sum is 47.

The square root of 966236591 is about 31084.3463981471. The cubic root of 966236591 is about 988.6164365311.

The spelling of 966236591 in words is "nine hundred sixty-six million, two hundred thirty-six thousand, five hundred ninety-one".