245135689 has 4 divisors (see below), whose sum is σ = 246008340. Its totient is φ = 244263040.

The previous prime is 245135651. The next prime is 245135713. The reversal of 245135689 is 986531542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156625225 + 88510464 = 12515^2 + 9408^2 .

It is a cyclic number.

It is not a de Polignac number, because 245135689 - 2¹³ = 245127497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245135629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435904 + ... + 436465.

It is an arithmetic number, because the mean of its divisors is an integer number (61502085).

Almost surely, 2^245135689 is an apocalyptic number.

It is an amenable number.

245135689 is a deficient number, since it is larger than the sum of its proper divisors (872651).

245135689 is an equidigital number, since it uses as much as digits as its factorization.

245135689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872650.

The product of its digits is 259200, while the sum is 43.

The square root of 245135689 is about 15656.8096686394. The cubic root of 245135689 is about 625.8479702740.

The spelling of 245135689 in words is "two hundred forty-five million, one hundred thirty-five thousand, six hundred eighty-nine".