47909837 has 2 divisors, whose sum is σ = 47909838. Its totient is φ = 47909836.

The previous prime is 47909833. The next prime is 47909839. The reversal of 47909837 is 73890974.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34703881 + 13205956 = 5891^2 + 3634^2 .

It is a cyclic number.

It is not a de Polignac number, because 47909837 - 2² = 47909833 is a prime.

Together with 47909839, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 47909791 and 47909800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47909831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23954918 + 23954919.

It is an arithmetic number, because the mean of its divisors is an integer number (23954919).

Almost surely, 2^47909837 is an apocalyptic number.

It is an amenable number.

47909837 is a deficient number, since it is larger than the sum of its proper divisors (1).

47909837 is an equidigital number, since it uses as much as digits as its factorization.

47909837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 47909837 is about 6921.6932177033. The cubic root of 47909837 is about 363.1964244903.

The spelling of 47909837 in words is "forty-seven million, nine hundred nine thousand, eight hundred thirty-seven".