53640109 has 2 divisors, whose sum is σ = 53640110. Its totient is φ = 53640108.

The previous prime is 53640107. The next prime is 53640143. The reversal of 53640109 is 90104635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 26234884 = 5235^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 53640109 - 2¹ = 53640107 is a prime.

It is a super-2 number, since 2×53640109² = 5754522587063762, which contains 22 as substring.

Together with 53640107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53640107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26820054 + 26820055.

It is an arithmetic number, because the mean of its divisors is an integer number (26820055).

Almost surely, 2^53640109 is an apocalyptic number.

It is an amenable number.

53640109 is a deficient number, since it is larger than the sum of its proper divisors (1).

53640109 is an equidigital number, since it uses as much as digits as its factorization.

53640109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 53640109 is about 7323.9408107931. The cubic root of 53640109 is about 377.1347495620.

The spelling of 53640109 in words is "fifty-three million, six hundred forty thousand, one hundred nine".