45208309 has 2 divisors, whose sum is σ = 45208310. Its totient is φ = 45208308.

The previous prime is 45208301. The next prime is 45208333. The reversal of 45208309 is 90380254.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25654225 + 19554084 = 5065^2 + 4422^2 .

It is a cyclic number.

It is not a de Polignac number, because 45208309 - 2³ = 45208301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45208301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22604154 + 22604155.

It is an arithmetic number, because the mean of its divisors is an integer number (22604155).

Almost surely, 2^45208309 is an apocalyptic number.

It is an amenable number.

45208309 is a deficient number, since it is larger than the sum of its proper divisors (1).

45208309 is an equidigital number, since it uses as much as digits as its factorization.

45208309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 45208309 is about 6723.7124417988. The cubic root of 45208309 is about 356.2373249209.

The spelling of 45208309 in words is "forty-five million, two hundred eight thousand, three hundred nine".