245956489 has 3 divisors (see below), whose sum is σ = 245972173. Its totient is φ = 245940806.

The previous prime is 245956471. The next prime is 245956523. The reversal of 245956489 is 984659542.

The square root of 245956489 is 15683.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 984659542 = 2 ⋅492329771.

It is not a de Polignac number, because 245956489 - 2⁹ = 245955977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245956409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 7842 + ... + 23524.

Almost surely, 2^245956489 is an apocalyptic number.

245956489 is the 15683-rd square number.

245956489 is the 7842-nd centered octagonal number.

It is an amenable number.

245956489 is a deficient number, since it is larger than the sum of its proper divisors (15684).

245956489 is an frugal number, since it uses more digits than its factorization.

245956489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31366 (or 15683 counting only the distinct ones).

The product of its digits is 3110400, while the sum is 52.

The cubic root of 245956489 is about 626.5457113708.

The spelling of 245956489 in words is "two hundred forty-five million, nine hundred fifty-six thousand, four hundred eighty-nine".