265198489 has 2 divisors, whose sum is σ = 265198490. Its totient is φ = 265198488.

The previous prime is 265198433. The next prime is 265198541. The reversal of 265198489 is 984891562.

It is an a-pointer prime, because the next prime (265198541) can be obtained adding 265198489 to its sum of digits (52).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179024400 + 86174089 = 13380^2 + 9283^2 .

It is a cyclic number.

It is not a de Polignac number, because 265198489 - 2⁷ = 265198361 is a prime.

It is not a weakly prime, because it can be changed into another prime (265198189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132599244 + 132599245.

It is an arithmetic number, because the mean of its divisors is an integer number (132599245).

Almost surely, 2^265198489 is an apocalyptic number.

It is an amenable number.

265198489 is a deficient number, since it is larger than the sum of its proper divisors (1).

265198489 is an equidigital number, since it uses as much as digits as its factorization.

265198489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1244160, while the sum is 52.

The square root of 265198489 is about 16284.9159960990. The cubic root of 265198489 is about 642.4761569172.

The spelling of 265198489 in words is "two hundred sixty-five million, one hundred ninety-eight thousand, four hundred eighty-nine".