245771489 has 2 divisors, whose sum is σ = 245771490. Its totient is φ = 245771488.

The previous prime is 245771473. The next prime is 245771551. The reversal of 245771489 is 984177542.

245771489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195077089 + 50694400 = 13967^2 + 7120^2 .

It is a cyclic number.

It is not a de Polignac number, because 245771489 - 2⁴ = 245771473 is a prime.

It is not a weakly prime, because it can be changed into another prime (245771089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122885744 + 122885745.

It is an arithmetic number, because the mean of its divisors is an integer number (122885745).

Almost surely, 2^245771489 is an apocalyptic number.

It is an amenable number.

245771489 is a deficient number, since it is larger than the sum of its proper divisors (1).

245771489 is an equidigital number, since it uses as much as digits as its factorization.

245771489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 47.

The square root of 245771489 is about 15677.1007842649. The cubic root of 245771489 is about 626.3885832670.

The spelling of 245771489 in words is "two hundred forty-five million, seven hundred seventy-one thousand, four hundred eighty-nine".