210123973 has 2 divisors, whose sum is σ = 210123974. Its totient is φ = 210123972.

The previous prime is 210123967. The next prime is 210124027. The reversal of 210123973 is 379321012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 183683809 + 26440164 = 13553^2 + 5142^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210123973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210123923) 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, 105061986 + 105061987.

It is an arithmetic number, because the mean of its divisors is an integer number (105061987).

Almost surely, 2^210123973 is an apocalyptic number.

It is an amenable number.

210123973 is a deficient number, since it is larger than the sum of its proper divisors (1).

210123973 is an equidigital number, since it uses as much as digits as its factorization.

210123973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 210123973 is about 14495.6535899559. The cubic root of 210123973 is about 594.5091382727.

Adding to 210123973 its reverse (379321012), we get a palindrome (589444985).

The spelling of 210123973 in words is "two hundred ten million, one hundred twenty-three thousand, nine hundred seventy-three".