45195209 has 2 divisors, whose sum is σ = 45195210. Its totient is φ = 45195208.

The previous prime is 45195203. The next prime is 45195233. The reversal of 45195209 is 90259154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42055225 + 3139984 = 6485^2 + 1772^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45195209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45195203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22597604 + 22597605.

It is an arithmetic number, because the mean of its divisors is an integer number (22597605).

Almost surely, 2^45195209 is an apocalyptic number.

It is an amenable number.

45195209 is a deficient number, since it is larger than the sum of its proper divisors (1).

45195209 is an equidigital number, since it uses as much as digits as its factorization.

45195209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 45195209 is about 6722.7382070106. The cubic root of 45195209 is about 356.2029126644.

The spelling of 45195209 in words is "forty-five million, one hundred ninety-five thousand, two hundred nine".