23031329 has 2 divisors, whose sum is σ = 23031330. Its totient is φ = 23031328.

The previous prime is 23031319. The next prime is 23031367. The reversal of 23031329 is 92313032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22819729 + 211600 = 4777^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 23031329 - 2⁴ = 23031313 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23031319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11515664 + 11515665.

It is an arithmetic number, because the mean of its divisors is an integer number (11515665).

Almost surely, 2^23031329 is an apocalyptic number.

It is an amenable number.

23031329 is a deficient number, since it is larger than the sum of its proper divisors (1).

23031329 is an equidigital number, since it uses as much as digits as its factorization.

23031329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 23031329 is about 4799.0966858358. The cubic root of 23031329 is about 284.5157633271.

The spelling of 23031329 in words is "twenty-three million, thirty-one thousand, three hundred twenty-nine".