745508009 has 2 divisors, whose sum is σ = 745508010. Its totient is φ = 745508008.

The previous prime is 745507979. The next prime is 745508051. The reversal of 745508009 is 900805547.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 630010000 + 115498009 = 25100^2 + 10747^2 .

It is a cyclic number.

It is not a de Polignac number, because 745508009 - 2¹⁶ = 745442473 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (745508209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372754004 + 372754005.

It is an arithmetic number, because the mean of its divisors is an integer number (372754005).

Almost surely, 2^745508009 is an apocalyptic number.

It is an amenable number.

745508009 is a deficient number, since it is larger than the sum of its proper divisors (1).

745508009 is an equidigital number, since it uses as much as digits as its factorization.

745508009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 745508009 is about 27303.9925468786. The cubic root of 745508009 is about 906.7427764798.

The spelling of 745508009 in words is "seven hundred forty-five million, five hundred eight thousand, nine".