53771891 has 2 divisors, whose sum is σ = 53771892. Its totient is φ = 53771890.

The previous prime is 53771863. The next prime is 53771897. The reversal of 53771891 is 19817735.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53771891 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (53771897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26885945 + 26885946.

It is an arithmetic number, because the mean of its divisors is an integer number (26885946).

Almost surely, 2^53771891 is an apocalyptic number.

53771891 is a deficient number, since it is larger than the sum of its proper divisors (1).

53771891 is an equidigital number, since it uses as much as digits as its factorization.

53771891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52920, while the sum is 41.

The square root of 53771891 is about 7332.9319511366. The cubic root of 53771891 is about 377.4433428120.

The spelling of 53771891 in words is "fifty-three million, seven hundred seventy-one thousand, eight hundred ninety-one".