53121109 has 2 divisors, whose sum is σ = 53121110. Its totient is φ = 53121108.

The previous prime is 53121091. The next prime is 53121143. The reversal of 53121109 is 90112135.

Together with previous prime (53121091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39652209 + 13468900 = 6297^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 53121109 - 2⁵ = 53121077 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53121109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53121709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26560554 + 26560555.

It is an arithmetic number, because the mean of its divisors is an integer number (26560555).

Almost surely, 2^53121109 is an apocalyptic number.

It is an amenable number.

53121109 is a deficient number, since it is larger than the sum of its proper divisors (1).

53121109 is an equidigital number, since it uses as much as digits as its factorization.

53121109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 53121109 is about 7288.4229432711. The cubic root of 53121109 is about 375.9144709830.

The spelling of 53121109 in words is "fifty-three million, one hundred twenty-one thousand, one hundred nine".