53611309 has 2 divisors, whose sum is σ = 53611310. Its totient is φ = 53611308.

The previous prime is 53611303. The next prime is 53611339. The reversal of 53611309 is 90311635.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42575625 + 11035684 = 6525^2 + 3322^2 .

It is a cyclic number.

It is not a de Polignac number, because 53611309 - 2³ = 53611301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53611301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26805654 + 26805655.

It is an arithmetic number, because the mean of its divisors is an integer number (26805655).

Almost surely, 2^53611309 is an apocalyptic number.

It is an amenable number.

53611309 is a deficient number, since it is larger than the sum of its proper divisors (1).

53611309 is an equidigital number, since it uses as much as digits as its factorization.

53611309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 53611309 is about 7321.9743921978. The cubic root of 53611309 is about 377.0672414637.

It can be divided in two parts, 5361 and 1309, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 53611309 in words is "fifty-three million, six hundred eleven thousand, three hundred nine".