53518691 has 2 divisors, whose sum is σ = 53518692. Its totient is φ = 53518690.

The previous prime is 53518681. The next prime is 53518693. The reversal of 53518691 is 19681535.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53518691 - 2⁶ = 53518627 is a prime.

It is a Sophie Germain prime.

Together with 53518693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53518693) 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, 26759345 + 26759346.

It is an arithmetic number, because the mean of its divisors is an integer number (26759346).

Almost surely, 2^53518691 is an apocalyptic number.

53518691 is a deficient number, since it is larger than the sum of its proper divisors (1).

53518691 is an equidigital number, since it uses as much as digits as its factorization.

53518691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 38.

The square root of 53518691 is about 7315.6469980447. The cubic root of 53518691 is about 376.8499779505.

The spelling of 53518691 in words is "fifty-three million, five hundred eighteen thousand, six hundred ninety-one".