47929872989 has 4 divisors (see below), whose sum is σ = 49582627260. Its totient is φ = 46277118720.

The previous prime is 47929872961. The next prime is 47929873027. The reversal of 47929872989 is 98927892974.

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 20553523225 + 27376349764 = 143365^2 + 165458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47929872989 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 (47929872589) 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, 826377092 + ... + 826377149.

It is an arithmetic number, because the mean of its divisors is an integer number (12395656815).

Almost surely, 2^47929872989 is an apocalyptic number.

It is an amenable number.

47929872989 is a deficient number, since it is larger than the sum of its proper divisors (1652754271).

47929872989 is a wasteful number, since it uses less digits than its factorization.

47929872989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652754270.

The product of its digits is 329204736, while the sum is 74.

The spelling of 47929872989 in words is "forty-seven billion, nine hundred twenty-nine million, eight hundred seventy-two thousand, nine hundred eighty-nine".