47879469389 has 4 divisors (see below), whose sum is σ = 47882513820. Its totient is φ = 47876424960.

The previous prime is 47879469367. The next prime is 47879469397. The reversal of 47879469389 is 98396497874.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23314236100 + 24565233289 = 152690^2 + 156733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47879469389 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 (47879469329) 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, 1498502 + ... + 1530119.

It is an arithmetic number, because the mean of its divisors is an integer number (11970628455).

Almost surely, 2^47879469389 is an apocalyptic number.

It is an amenable number.

47879469389 is a deficient number, since it is larger than the sum of its proper divisors (3044431).

47879469389 is a wasteful number, since it uses less digits than its factorization.

47879469389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3044430.

The product of its digits is 658409472, while the sum is 74.

The spelling of 47879469389 in words is "forty-seven billion, eight hundred seventy-nine million, four hundred sixty-nine thousand, three hundred eighty-nine".