69891 has 4 divisors (see below), whose sum is σ = 93192. Its totient is φ = 46592.

The previous prime is 69877. The next prime is 69899. The reversal of 69891 is 19896.

It is a happy number.

69891 is nontrivially palindromic in base 12.

69891 is an esthetic number in base 12, because in such base its adjacent digits differ by 1.

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 69891 - 2⁵ = 69859 is a prime.

It is a D-number.

69891 is a lucky number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 69891.

It is not an unprimeable number, because it can be changed into a prime (69899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11646 + ... + 11651.

It is an arithmetic number, because the mean of its divisors is an integer number (23298).

2⁶⁹⁸⁹¹ is an apocalyptic number.

69891 is a deficient number, since it is larger than the sum of its proper divisors (23301).

69891 is a wasteful number, since it uses less digits than its factorization.

69891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23300.

The product of its digits is 3888, while the sum is 33.

The square root of 69891 is about 264.3690602170. The cubic root of 69891 is about 41.1914504521.

The spelling of 69891 in words is "sixty-nine thousand, eight hundred ninety-one".