245039189 has 2 divisors, whose sum is σ = 245039190. Its totient is φ = 245039188.

The previous prime is 245039147. The next prime is 245039209. The reversal of 245039189 is 981930542.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 131446225 + 113592964 = 11465^2 + 10658^2 .

It is a cyclic number.

It is not a de Polignac number, because 245039189 - 2¹⁶ = 244973653 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (245039129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122519594 + 122519595.

It is an arithmetic number, because the mean of its divisors is an integer number (122519595).

Almost surely, 2^245039189 is an apocalyptic number.

It is an amenable number.

245039189 is a deficient number, since it is larger than the sum of its proper divisors (1).

245039189 is an equidigital number, since it uses as much as digits as its factorization.

245039189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 245039189 is about 15653.7276391280. The cubic root of 245039189 is about 625.7658358228.

The spelling of 245039189 in words is "two hundred forty-five million, thirty-nine thousand, one hundred eighty-nine".