53919643 has 2 divisors, whose sum is σ = 53919644. Its totient is φ = 53919642.

The previous prime is 53919641. The next prime is 53919667. The reversal of 53919643 is 34691935.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53919643 - 2¹ = 53919641 is a prime.

Together with 53919641, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 53919596 and 53919605.

It is not a weakly prime, because it can be changed into another prime (53919641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26959821 + 26959822.

It is an arithmetic number, because the mean of its divisors is an integer number (26959822).

Almost surely, 2^53919643 is an apocalyptic number.

53919643 is a deficient number, since it is larger than the sum of its proper divisors (1).

53919643 is an equidigital number, since it uses as much as digits as its factorization.

53919643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 40.

The square root of 53919643 is about 7342.9995914476. Note that the first 3 decimals coincide. The cubic root of 53919643 is about 377.7887339735.

The spelling of 53919643 in words is "fifty-three million, nine hundred nineteen thousand, six hundred forty-three".