245478989 has 8 divisors (see below), whose sum is σ = 282116160. Its totient is φ = 209234016.

The previous prime is 245478983. The next prime is 245479001. The reversal of 245478989 is 989874542.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245478989 - 2⁸ = 245478733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245478983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96704 + ... + 99209.

It is an arithmetic number, because the mean of its divisors is an integer number (35264520).

Almost surely, 2^245478989 is an apocalyptic number.

It is an amenable number.

245478989 is a deficient number, since it is larger than the sum of its proper divisors (36637171).

245478989 is a wasteful number, since it uses less digits than its factorization.

245478989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196099.

The product of its digits is 5806080, while the sum is 56.

The square root of 245478989 is about 15667.7691136932. The cubic root of 245478989 is about 626.1399900255.

The spelling of 245478989 in words is "two hundred forty-five million, four hundred seventy-eight thousand, nine hundred eighty-nine".