279285421117 has 4 divisors (see below), whose sum is σ = 279288074080. Its totient is φ = 279282768156.

The previous prime is 279285421067. The next prime is 279285421169. The reversal of 279285421117 is 711124582972.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-279285421117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279285421817) 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 3 ways as a sum of consecutive naturals, for example, 1161753 + ... + 1381390.

It is an arithmetic number, because the mean of its divisors is an integer number (69822018520).

Almost surely, 2^279285421117 is an apocalyptic number.

It is an amenable number.

279285421117 is a deficient number, since it is larger than the sum of its proper divisors (2652963).

279285421117 is a wasteful number, since it uses less digits than its factorization.

279285421117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652962.

The product of its digits is 564480, while the sum is 49.

The spelling of 279285421117 in words is "two hundred seventy-nine billion, two hundred eighty-five million, four hundred twenty-one thousand, one hundred seventeen".