230323721 has 2 divisors, whose sum is σ = 230323722. Its totient is φ = 230323720.

The previous prime is 230323697. The next prime is 230323763. The reversal of 230323721 is 127323032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 228463225 + 1860496 = 15115^2 + 1364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230323721 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (230320721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115161860 + 115161861.

It is an arithmetic number, because the mean of its divisors is an integer number (115161861).

Almost surely, 2^230323721 is an apocalyptic number.

It is an amenable number.

230323721 is a deficient number, since it is larger than the sum of its proper divisors (1).

230323721 is an equidigital number, since it uses as much as digits as its factorization.

230323721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 230323721 is about 15176.4199006221. The cubic root of 230323721 is about 612.9798841450.

Adding to 230323721 its reverse (127323032), we get a palindrome (357646753).

The spelling of 230323721 in words is "two hundred thirty million, three hundred twenty-three thousand, seven hundred twenty-one".