47731637 has 2 divisors, whose sum is σ = 47731638. Its totient is φ = 47731636.

The previous prime is 47731633. The next prime is 47731643. The reversal of 47731637 is 73613774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40119556 + 7612081 = 6334^2 + 2759^2 .

It is a cyclic number.

It is not a de Polignac number, because 47731637 - 2² = 47731633 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47731637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47731633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23865818 + 23865819.

It is an arithmetic number, because the mean of its divisors is an integer number (23865819).

Almost surely, 2^47731637 is an apocalyptic number.

It is an amenable number.

47731637 is a deficient number, since it is larger than the sum of its proper divisors (1).

47731637 is an equidigital number, since it uses as much as digits as its factorization.

47731637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 38.

The square root of 47731637 is about 6908.8086527273. The cubic root of 47731637 is about 362.7455636175.

The spelling of 47731637 in words is "forty-seven million, seven hundred thirty-one thousand, six hundred thirty-seven".