245666993 has 8 divisors (see below), whose sum is σ = 288615936. Its totient is φ = 206154000.

The previous prime is 245666989. The next prime is 245667001. The reversal of 245666993 is 399666542.

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

It is not a de Polignac number, because 245666993 - 2² = 245666989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245666293) 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 7 ways as a sum of consecutive naturals, for example, 858833 + ... + 859118.

It is an arithmetic number, because the mean of its divisors is an integer number (36076992).

Almost surely, 2^245666993 is an apocalyptic number.

It is an amenable number.

245666993 is a deficient number, since it is larger than the sum of its proper divisors (42948943).

245666993 is a wasteful number, since it uses less digits than its factorization.

245666993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717975.

The product of its digits is 2099520, while the sum is 50.

The square root of 245666993 is about 15673.7676708569. The cubic root of 245666993 is about 626.2997956694.

The spelling of 245666993 in words is "two hundred forty-five million, six hundred sixty-six thousand, nine hundred ninety-three".