53664109 has 2 divisors, whose sum is σ = 53664110. Its totient is φ = 53664108.

The previous prime is 53664101. The next prime is 53664157. The reversal of 53664109 is 90146635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50722884 + 2941225 = 7122^2 + 1715^2 .

It is a cyclic number.

It is not a de Polignac number, because 53664109 - 2³ = 53664101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53664101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26832054 + 26832055.

It is an arithmetic number, because the mean of its divisors is an integer number (26832055).

Almost surely, 2^53664109 is an apocalyptic number.

It is an amenable number.

53664109 is a deficient number, since it is larger than the sum of its proper divisors (1).

53664109 is an equidigital number, since it uses as much as digits as its factorization.

53664109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 53664109 is about 7325.5790897375. The cubic root of 53664109 is about 377.1909878544.

The spelling of 53664109 in words is "fifty-three million, six hundred sixty-four thousand, one hundred nine".