230723021 has 2 divisors, whose sum is σ = 230723022. Its totient is φ = 230723020.

The previous prime is 230723011. The next prime is 230723029. The reversal of 230723021 is 120327032.

230723021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171217225 + 59505796 = 13085^2 + 7714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-230723021 is a prime.

It is a super-2 number, since 2×230723021² = 106466224838732882, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 230722984 and 230723002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (230723029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115361510 + 115361511.

It is an arithmetic number, because the mean of its divisors is an integer number (115361511).

Almost surely, 2^230723021 is an apocalyptic number.

It is an amenable number.

230723021 is a deficient number, since it is larger than the sum of its proper divisors (1).

230723021 is an equidigital number, since it uses as much as digits as its factorization.

230723021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 230723021 is about 15189.5694804033. The cubic root of 230723021 is about 613.3339098595. Note that the first 3 decimals are identical.

The spelling of 230723021 in words is "two hundred thirty million, seven hundred twenty-three thousand, twenty-one".