745325209 has 2 divisors, whose sum is σ = 745325210. Its totient is φ = 745325208.

The previous prime is 745325159. The next prime is 745325227. The reversal of 745325209 is 902523547.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 726140809 + 19184400 = 26947^2 + 4380^2 .

It is an emirp because it is prime and its reverse (902523547) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 745325209 - 2⁷ = 745325081 is a prime.

It is not a weakly prime, because it can be changed into another prime (745325809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372662604 + 372662605.

It is an arithmetic number, because the mean of its divisors is an integer number (372662605).

Almost surely, 2^745325209 is an apocalyptic number.

It is an amenable number.

745325209 is a deficient number, since it is larger than the sum of its proper divisors (1).

745325209 is an equidigital number, since it uses as much as digits as its factorization.

745325209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 745325209 is about 27300.6448458640. The cubic root of 745325209 is about 906.6686587296.

The spelling of 745325209 in words is "seven hundred forty-five million, three hundred twenty-five thousand, two hundred nine".