53978143 has 2 divisors, whose sum is σ = 53978144. Its totient is φ = 53978142.

The previous prime is 53978131. The next prime is 53978147. The reversal of 53978143 is 34187935.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53978143 - 2⁹ = 53977631 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 53978096 and 53978105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53978147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26989071 + 26989072.

It is an arithmetic number, because the mean of its divisors is an integer number (26989072).

Almost surely, 2^53978143 is an apocalyptic number.

53978143 is a deficient number, since it is larger than the sum of its proper divisors (1).

53978143 is an equidigital number, since it uses as much as digits as its factorization.

53978143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 53978143 is about 7346.9818973508. The cubic root of 53978143 is about 377.9253116154.

The spelling of 53978143 in words is "fifty-three million, nine hundred seventy-eight thousand, one hundred forty-three".