45071309 has 2 divisors, whose sum is σ = 45071310. Its totient is φ = 45071308.

The previous prime is 45071281. The next prime is 45071321. The reversal of 45071309 is 90317054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27008809 + 18062500 = 5197^2 + 4250^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45071309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45071399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22535654 + 22535655.

It is an arithmetic number, because the mean of its divisors is an integer number (22535655).

Almost surely, 2^45071309 is an apocalyptic number.

It is an amenable number.

45071309 is a deficient number, since it is larger than the sum of its proper divisors (1).

45071309 is an equidigital number, since it uses as much as digits as its factorization.

45071309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 45071309 is about 6713.5168875933. The cubic root of 45071309 is about 355.8771116689.

The spelling of 45071309 in words is "forty-five million, seventy-one thousand, three hundred nine".