45378709 has 2 divisors, whose sum is σ = 45378710. Its totient is φ = 45378708.

The previous prime is 45378703. The next prime is 45378721. The reversal of 45378709 is 90787354.

It is a happy number.

45378709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44422225 + 956484 = 6665^2 + 978^2 .

It is a cyclic number.

It is not a de Polignac number, because 45378709 - 2⁹ = 45378197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45378703) 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, 22689354 + 22689355.

It is an arithmetic number, because the mean of its divisors is an integer number (22689355).

Almost surely, 2^45378709 is an apocalyptic number.

It is an amenable number.

45378709 is a deficient number, since it is larger than the sum of its proper divisors (1).

45378709 is an equidigital number, since it uses as much as digits as its factorization.

45378709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 45378709 is about 6736.3720948297. The cubic root of 45378709 is about 356.6843425407.

The spelling of 45378709 in words is "forty-five million, three hundred seventy-eight thousand, seven hundred nine".