47787197 has 2 divisors, whose sum is σ = 47787198. Its totient is φ = 47787196.

The previous prime is 47787161. The next prime is 47787247. The reversal of 47787197 is 79178774.

It is an a-pointer prime, because the next prime (47787247) can be obtained adding 47787197 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43811161 + 3976036 = 6619^2 + 1994^2 .

It is a cyclic number.

It is not a de Polignac number, because 47787197 - 2¹⁰ = 47786173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47787497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23893598 + 23893599.

It is an arithmetic number, because the mean of its divisors is an integer number (23893599).

Almost surely, 2^47787197 is an apocalyptic number.

It is an amenable number.

47787197 is a deficient number, since it is larger than the sum of its proper divisors (1).

47787197 is an equidigital number, since it uses as much as digits as its factorization.

47787197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691488, while the sum is 50.

The square root of 47787197 is about 6912.8284370437. The cubic root of 47787197 is about 362.8862552703.

The spelling of 47787197 in words is "forty-seven million, seven hundred eighty-seven thousand, one hundred ninety-seven".