245678979 has 32 divisors (see below), whose sum is σ = 405712384. Its totient is φ = 128770560.

The previous prime is 245678977. The next prime is 245679023. The reversal of 245678979 is 979876542.

It is not a de Polignac number, because 245678979 - 2¹ = 245678977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (245678977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41739 + ... + 47259.

It is an arithmetic number, because the mean of its divisors is an integer number (12678512).

Almost surely, 2^245678979 is an apocalyptic number.

245678979 is a deficient number, since it is larger than the sum of its proper divisors (160033405).

245678979 is a wasteful number, since it uses less digits than its factorization.

245678979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707.

The product of its digits is 7620480, while the sum is 57.

The square root of 245678979 is about 15674.1500248020. The cubic root of 245678979 is about 626.3099811474.

The spelling of 245678979 in words is "two hundred forty-five million, six hundred seventy-eight thousand, nine hundred seventy-nine".