230721169 has 4 divisors (see below), whose sum is σ = 263681344. Its totient is φ = 197760996.

The previous prime is 230721163. The next prime is 230721181. The reversal of 230721169 is 961127032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 230721169 - 2⁷ = 230721041 is a prime.

It is a super-2 number, since 2×230721169² = 106464515649453122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 230721169.

It is not an unprimeable number, because it can be changed into a prime (230721163) 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, 16480077 + ... + 16480090.

It is an arithmetic number, because the mean of its divisors is an integer number (65920336).

Almost surely, 2^230721169 is an apocalyptic number.

It is an amenable number.

230721169 is a deficient number, since it is larger than the sum of its proper divisors (32960175).

230721169 is an equidigital number, since it uses as much as digits as its factorization.

230721169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32960174.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 230721169 is about 15189.5085173945. The cubic root of 230721169 is about 613.3322687902.

The spelling of 230721169 in words is "two hundred thirty million, seven hundred twenty-one thousand, one hundred sixty-nine".