45409109 has 2 divisors, whose sum is σ = 45409110. Its totient is φ = 45409108.

The previous prime is 45409103. The next prime is 45409123. The reversal of 45409109 is 90190454.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 13712209 = 5630^2 + 3703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45409109 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45409103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22704554 + 22704555.

It is an arithmetic number, because the mean of its divisors is an integer number (22704555).

Almost surely, 2^45409109 is an apocalyptic number.

It is an amenable number.

45409109 is a deficient number, since it is larger than the sum of its proper divisors (1).

45409109 is an equidigital number, since it uses as much as digits as its factorization.

45409109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 45409109 is about 6738.6281244776. The cubic root of 45409109 is about 356.7639744782.

The spelling of 45409109 in words is "forty-five million, four hundred nine thousand, one hundred nine".