72869 has 2 divisors, whose sum is σ = 72870. Its totient is φ = 72868.

The previous prime is 72859. The next prime is 72871. The reversal of 72869 is 96827.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68644 + 4225 = 262^2 + 65^2 .

It is an emirp because it is prime and its reverse (96827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72869 - 2⁸ = 72613 is a prime.

It is a super-2 number, since 2×72869² = 10619782322, which contains 22 as substring.

Together with 72871, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36434 + 36435.

It is an arithmetic number, because the mean of its divisors is an integer number (36435).

2⁷²⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

72869 is a deficient number, since it is larger than the sum of its proper divisors (1).

72869 is an equidigital number, since it uses as much as digits as its factorization.

72869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 72869 is about 269.9425864883. The cubic root of 72869 is about 41.7683772945.

It can be divided in two parts, 728 and 69, that added together give a palindrome (797).

The spelling of 72869 in words is "seventy-two thousand, eight hundred sixty-nine".