53781911 has 2 divisors, whose sum is σ = 53781912. Its totient is φ = 53781910.

The previous prime is 53781901. The next prime is 53781929. The reversal of 53781911 is 11918735.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53781911 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53781901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26890955 + 26890956.

It is an arithmetic number, because the mean of its divisors is an integer number (26890956).

Almost surely, 2^53781911 is an apocalyptic number.

53781911 is a deficient number, since it is larger than the sum of its proper divisors (1).

53781911 is an equidigital number, since it uses as much as digits as its factorization.

53781911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 35.

The square root of 53781911 is about 7333.6151385248. The cubic root of 53781911 is about 377.4667859613.

The spelling of 53781911 in words is "fifty-three million, seven hundred eighty-one thousand, nine hundred eleven".