40465289 has 2 divisors, whose sum is σ = 40465290. Its totient is φ = 40465288.

The previous prime is 40465283. The next prime is 40465291. The reversal of 40465289 is 98256404.

40465289 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., 38688400 + 1776889 = 6220^2 + 1333^2 .

It is a cyclic number.

It is not a de Polignac number, because 40465289 - 2⁴ = 40465273 is a prime.

It is a super-2 number, since 2×40465289² = 3274879227707042, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 40465291, 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 (40465283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20232644 + 20232645.

It is an arithmetic number, because the mean of its divisors is an integer number (20232645).

Almost surely, 2^40465289 is an apocalyptic number.

It is an amenable number.

40465289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40465289 is an equidigital number, since it uses as much as digits as its factorization.

40465289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 40465289 is about 6361.2332923734. The cubic root of 40465289 is about 343.3161356474.

The spelling of 40465289 in words is "forty million, four hundred sixty-five thousand, two hundred eighty-nine".