210090061 has 2 divisors, whose sum is σ = 210090062. Its totient is φ = 210090060.

The previous prime is 210090053. The next prime is 210090077. The reversal of 210090061 is 160090012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206066025 + 4024036 = 14355^2 + 2006^2 .

It is a cyclic number.

It is not a de Polignac number, because 210090061 - 2³ = 210090053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210097061) 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, 105045030 + 105045031.

It is an arithmetic number, because the mean of its divisors is an integer number (105045031).

Almost surely, 2^210090061 is an apocalyptic number.

It is an amenable number.

210090061 is a deficient number, since it is larger than the sum of its proper divisors (1).

210090061 is an equidigital number, since it uses as much as digits as its factorization.

210090061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 210090061 is about 14494.4838128165. The cubic root of 210090061 is about 594.4771538553.

The spelling of 210090061 in words is "two hundred ten million, ninety thousand, sixty-one".