47121961839 has 4 divisors (see below), whose sum is σ = 62829282456. Its totient is φ = 31414641224.

The previous prime is 47121961829. The next prime is 47121961849. The reversal of 47121961839 is 93816912174.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (47121961829) and next prime (47121961849).

It is a cyclic number.

It is not a de Polignac number, because 47121961839 - 2¹¹ = 47121959791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 47121961791 and 47121961800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47121961829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7853660304 + ... + 7853660309.

It is an arithmetic number, because the mean of its divisors is an integer number (15707320614).

Almost surely, 2^47121961839 is an apocalyptic number.

47121961839 is a deficient number, since it is larger than the sum of its proper divisors (15707320617).

47121961839 is a wasteful number, since it uses less digits than its factorization.

47121961839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15707320616.

The product of its digits is 653184, while the sum is 51.

The spelling of 47121961839 in words is "forty-seven billion, one hundred twenty-one million, nine hundred sixty-one thousand, eight hundred thirty-nine".