210669013 has 2 divisors, whose sum is σ = 210669014. Its totient is φ = 210669012.

The previous prime is 210668893. The next prime is 210669031. The reversal of 210669013 is 310966012.

Together with next prime (210669031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161976529 + 48692484 = 12727^2 + 6978^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210669013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210669073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105334506 + 105334507.

It is an arithmetic number, because the mean of its divisors is an integer number (105334507).

Almost surely, 2^210669013 is an apocalyptic number.

It is an amenable number.

210669013 is a deficient number, since it is larger than the sum of its proper divisors (1).

210669013 is an equidigital number, since it uses as much as digits as its factorization.

210669013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 210669013 is about 14514.4415324876. The cubic root of 210669013 is about 595.0227263405.

The spelling of 210669013 in words is "two hundred ten million, six hundred sixty-nine thousand, thirteen".