47831549 has 2 divisors, whose sum is σ = 47831550. Its totient is φ = 47831548.

The previous prime is 47831519. The next prime is 47831551. The reversal of 47831549 is 94513874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45995524 + 1836025 = 6782^2 + 1355^2 .

It is a cyclic number.

It is not a de Polignac number, because 47831549 - 2⁸ = 47831293 is a prime.

Together with 47831551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47831519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23915774 + 23915775.

It is an arithmetic number, because the mean of its divisors is an integer number (23915775).

Almost surely, 2^47831549 is an apocalyptic number.

It is an amenable number.

47831549 is a deficient number, since it is larger than the sum of its proper divisors (1).

47831549 is an equidigital number, since it uses as much as digits as its factorization.

47831549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 41.

The square root of 47831549 is about 6916.0356418977. The cubic root of 47831549 is about 362.9984872454.

The spelling of 47831549 in words is "forty-seven million, eight hundred thirty-one thousand, five hundred forty-nine".