145340009 has 2 divisors, whose sum is σ = 145340010. Its totient is φ = 145340008.

The previous prime is 145339993. The next prime is 145340017. The reversal of 145340009 is 900043541.

145340009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128142400 + 17197609 = 11320^2 + 4147^2 .

It is an emirp because it is prime and its reverse (900043541) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 145340009 - 2⁴ = 145339993 is a prime.

It is a super-2 number, since 2×145340009² = 42247436432240162, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145340009.

It is not a weakly prime, because it can be changed into another prime (145040009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72670004 + 72670005.

It is an arithmetic number, because the mean of its divisors is an integer number (72670005).

Almost surely, 2^145340009 is an apocalyptic number.

It is an amenable number.

145340009 is a deficient number, since it is larger than the sum of its proper divisors (1).

145340009 is an equidigital number, since it uses as much as digits as its factorization.

145340009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 145340009 is about 12055.7044174117. The cubic root of 145340009 is about 525.7691028298.

The spelling of 145340009 in words is "one hundred forty-five million, three hundred forty thousand, nine".