53478109 has 2 divisors, whose sum is σ = 53478110. Its totient is φ = 53478108.

The previous prime is 53478101. The next prime is 53478133. The reversal of 53478109 is 90187435.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43270084 + 10208025 = 6578^2 + 3195^2 .

It is a cyclic number.

It is not a de Polignac number, because 53478109 - 2³ = 53478101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53478101) 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, 26739054 + 26739055.

It is an arithmetic number, because the mean of its divisors is an integer number (26739055).

Almost surely, 2^53478109 is an apocalyptic number.

It is an amenable number.

53478109 is a deficient number, since it is larger than the sum of its proper divisors (1).

53478109 is an equidigital number, since it uses as much as digits as its factorization.

53478109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 53478109 is about 7312.8728281025. The cubic root of 53478109 is about 376.7547016232.

It can be divided in two parts, 5347 and 8109, that added together give a square (13456 = 116²).

The spelling of 53478109 in words is "fifty-three million, four hundred seventy-eight thousand, one hundred nine".