45644009 has 2 divisors, whose sum is σ = 45644010. Its totient is φ = 45644008.

The previous prime is 45643987. The next prime is 45644041. The reversal of 45644009 is 90044654.

It is a happy number.

It is an a-pointer prime, because the next prime (45644041) can be obtained adding 45644009 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31416025 + 14227984 = 5605^2 + 3772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45644009 is a prime.

It is a super-3 number, since 3×45644009³ (a number of 24 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (45644089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22822004 + 22822005.

It is an arithmetic number, because the mean of its divisors is an integer number (22822005).

Almost surely, 2^45644009 is an apocalyptic number.

It is an amenable number.

45644009 is a deficient number, since it is larger than the sum of its proper divisors (1).

45644009 is an equidigital number, since it uses as much as digits as its factorization.

45644009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 45644009 is about 6756.0350058300. The cubic root of 45644009 is about 357.3780933069.

The spelling of 45644009 in words is "forty-five million, six hundred forty-four thousand, nine".