53816891 has 2 divisors, whose sum is σ = 53816892. Its totient is φ = 53816890.

The previous prime is 53816857. The next prime is 53816929. The reversal of 53816891 is 19861835.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53816891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53816801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26908445 + 26908446.

It is an arithmetic number, because the mean of its divisors is an integer number (26908446).

Almost surely, 2^53816891 is an apocalyptic number.

53816891 is a deficient number, since it is larger than the sum of its proper divisors (1).

53816891 is an equidigital number, since it uses as much as digits as its factorization.

53816891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 41.

The square root of 53816891 is about 7335.9996592148. Note that the first 3 decimals coincide. The cubic root of 53816891 is about 377.5486035983.

The spelling of 53816891 in words is "fifty-three million, eight hundred sixteen thousand, eight hundred ninety-one".