54863509 has 2 divisors, whose sum is σ = 54863510. Its totient is φ = 54863508.

The previous prime is 54863467. The next prime is 54863513. The reversal of 54863509 is 90536845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46580625 + 8282884 = 6825^2 + 2878^2 .

It is a cyclic number.

It is not a de Polignac number, because 54863509 - 2¹¹ = 54861461 is a 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 (54863519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27431754 + 27431755.

It is an arithmetic number, because the mean of its divisors is an integer number (27431755).

Almost surely, 2^54863509 is an apocalyptic number.

It is an amenable number.

54863509 is a deficient number, since it is larger than the sum of its proper divisors (1).

54863509 is an equidigital number, since it uses as much as digits as its factorization.

54863509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 54863509 is about 7406.9905494742. The cubic root of 54863509 is about 379.9803983425.

The spelling of 54863509 in words is "fifty-four million, eight hundred sixty-three thousand, five hundred nine".