47831129 has 2 divisors, whose sum is σ = 47831130. Its totient is φ = 47831128.

The previous prime is 47831117. The next prime is 47831131. The reversal of 47831129 is 92113874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47265625 + 565504 = 6875^2 + 752^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47831129 is a prime.

Together with 47831131, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (47851129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23915564 + 23915565.

It is an arithmetic number, because the mean of its divisors is an integer number (23915565).

Almost surely, 2^47831129 is an apocalyptic number.

It is an amenable number.

47831129 is a deficient number, since it is larger than the sum of its proper divisors (1).

47831129 is an equidigital number, since it uses as much as digits as its factorization.

47831129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 47831129 is about 6916.0052776151. The cubic root of 47831129 is about 362.9974247680.

The spelling of 47831129 in words is "forty-seven million, eight hundred thirty-one thousand, one hundred twenty-nine".