47909937987 has 24 divisors (see below), whose sum is σ = 70180562400. Its totient is φ = 31491600768.

The previous prime is 47909937979. The next prime is 47909938003. The reversal of 47909937987 is 78973990974.

47909937987 is a `hidden beast` number, since 4 + 7 + 90 + 99 + 379 + 87 = 666.

It is not a de Polignac number, because 47909937987 - 2³ = 47909937979 is a prime.

It is a super-2 number, since 2×47909937987² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (47909930987) 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 23 ways as a sum of consecutive naturals, for example, 99439 + ... + 325127.

It is an arithmetic number, because the mean of its divisors is an integer number (2924190100).

Almost surely, 2^47909937987 is an apocalyptic number.

47909937987 is a deficient number, since it is larger than the sum of its proper divisors (22270624413).

47909937987 is a wasteful number, since it uses less digits than its factorization.

47909937987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226027 (or 226024 counting only the distinct ones).

The product of its (nonzero) digits is 216040608, while the sum is 72.

The spelling of 47909937987 in words is "forty-seven billion, nine hundred nine million, nine hundred thirty-seven thousand, nine hundred eighty-seven".