247139008813 has 4 divisors (see below), whose sum is σ = 247174921408. Its totient is φ = 247103096220.

The previous prime is 247139008811. The next prime is 247139008819. The reversal of 247139008813 is 318800931742.

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 not a de Polignac number, because 247139008813 - 2¹ = 247139008811 is a prime.

It is a super-2 number, since 2×247139008813² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247139008811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17945973 + ... + 17959738.

It is an arithmetic number, because the mean of its divisors is an integer number (61793730352).

Almost surely, 2^247139008813 is an apocalyptic number.

It is an amenable number.

247139008813 is a deficient number, since it is larger than the sum of its proper divisors (35912595).

247139008813 is an equidigital number, since it uses as much as digits as its factorization.

247139008813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35912594.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 247139008813 in words is "two hundred forty-seven billion, one hundred thirty-nine million, eight thousand, eight hundred thirteen".