53947891 has 2 divisors, whose sum is σ = 53947892. Its totient is φ = 53947890.

The previous prime is 53947877. The next prime is 53947913. The reversal of 53947891 is 19874935.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53947891 - 2⁷ = 53947763 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53947871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26973945 + 26973946.

It is an arithmetic number, because the mean of its divisors is an integer number (26973946).

Almost surely, 2^53947891 is an apocalyptic number.

53947891 is a deficient number, since it is larger than the sum of its proper divisors (1).

53947891 is an equidigital number, since it uses as much as digits as its factorization.

53947891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 272160, while the sum is 46.

The square root of 53947891 is about 7344.9228042233. The cubic root of 53947891 is about 377.8546957919.

The spelling of 53947891 in words is "fifty-three million, nine hundred forty-seven thousand, eight hundred ninety-one".