245356009 has 2 divisors, whose sum is σ = 245356010. Its totient is φ = 245356008.

The previous prime is 245355997. The next prime is 245356031. The reversal of 245356009 is 900653542.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 245235600 + 120409 = 15660^2 + 347^2 .

It is a cyclic number.

It is not a de Polignac number, because 245356009 - 2²¹ = 243258857 is a prime.

It is not a weakly prime, because it can be changed into another prime (245356099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122678004 + 122678005.

It is an arithmetic number, because the mean of its divisors is an integer number (122678005).

Almost surely, 2^245356009 is an apocalyptic number.

It is an amenable number.

245356009 is a deficient number, since it is larger than the sum of its proper divisors (1).

245356009 is an equidigital number, since it uses as much as digits as its factorization.

245356009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 245356009 is about 15663.8440045858. The cubic root of 245356009 is about 626.0354114099.

The spelling of 245356009 in words is "two hundred forty-five million, three hundred fifty-six thousand, nine".