47831137 has 4 divisors (see below), whose sum is σ = 48615316. Its totient is φ = 47046960.

The previous prime is 47831131. The next prime is 47831143. The reversal of 47831137 is 73113874.

47831137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (47831131) and next prime (47831143).

It can be written as a sum of positive squares in 2 ways, for example, as 1577536 + 46253601 = 1256^2 + 6801^2 .

It is a cyclic number.

It is not a de Polignac number, because 47831137 - 2³ = 47831129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47831131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391998 + ... + 392119.

It is an arithmetic number, because the mean of its divisors is an integer number (12153829).

Almost surely, 2^47831137 is an apocalyptic number.

It is an amenable number.

47831137 is a deficient number, since it is larger than the sum of its proper divisors (784179).

47831137 is an equidigital number, since it uses as much as digits as its factorization.

47831137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784178.

The product of its digits is 14112, while the sum is 34.

The square root of 47831137 is about 6916.0058559836. The cubic root of 47831137 is about 362.9974450058.

The spelling of 47831137 in words is "forty-seven million, eight hundred thirty-one thousand, one hundred thirty-seven".