245344009 has 2 divisors, whose sum is σ = 245344010. Its totient is φ = 245344008.

The previous prime is 245343961. The next prime is 245344027. The reversal of 245344009 is 900443542.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165688384 + 79655625 = 12872^2 + 8925^2 .

It is a cyclic number.

It is not a de Polignac number, because 245344009 - 2¹⁷ = 245212937 is a prime.

It is not a weakly prime, because it can be changed into another prime (245344069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122672004 + 122672005.

It is an arithmetic number, because the mean of its divisors is an integer number (122672005).

Almost surely, 2^245344009 is an apocalyptic number.

It is an amenable number.

245344009 is a deficient number, since it is larger than the sum of its proper divisors (1).

245344009 is an equidigital number, since it uses as much as digits as its factorization.

245344009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 245344009 is about 15663.4609521651. The cubic root of 245344009 is about 626.0252050877.

The spelling of 245344009 in words is "two hundred forty-five million, three hundred forty-four thousand, nine".