40330289 has 2 divisors, whose sum is σ = 40330290. Its totient is φ = 40330288.

The previous prime is 40330267. The next prime is 40330291. The reversal of 40330289 is 98203304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 134689 = 6340^2 + 367^2 .

It is a cyclic number.

It is not a de Polignac number, because 40330289 - 2²⁴ = 23553073 is a prime.

It is a Sophie Germain prime.

Together with 40330291, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40330189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20165144 + 20165145.

It is an arithmetic number, because the mean of its divisors is an integer number (20165145).

Almost surely, 2^40330289 is an apocalyptic number.

It is an amenable number.

40330289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40330289 is an equidigital number, since it uses as much as digits as its factorization.

40330289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 40330289 is about 6350.6132774717. The cubic root of 40330289 is about 342.9339206940.

The spelling of 40330289 in words is "forty million, three hundred thirty thousand, two hundred eighty-nine".