210000047 has 2 divisors, whose sum is σ = 210000048. Its totient is φ = 210000046.

The previous prime is 210000023. The next prime is 210000067. The reversal of 210000047 is 740000012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210000047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 209999986 and 210000040.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210000017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105000023 + 105000024.

It is an arithmetic number, because the mean of its divisors is an integer number (105000024).

Almost surely, 2^210000047 is an apocalyptic number.

210000047 is a deficient number, since it is larger than the sum of its proper divisors (1).

210000047 is an equidigital number, since it uses as much as digits as its factorization.

210000047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 210000047 is about 14491.3783678434. The cubic root of 210000047 is about 594.3922396199.

Adding to 210000047 its reverse (740000012), we get a palindrome (950000059).

The spelling of 210000047 in words is "two hundred ten million, forty-seven", and thus it is an aban number.