54645509 has 2 divisors, whose sum is σ = 54645510. Its totient is φ = 54645508.

The previous prime is 54645439. The next prime is 54645527. The reversal of 54645509 is 90554645.

54645509 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41344900 + 13300609 = 6430^2 + 3647^2 .

It is a cyclic number.

It is not a de Polignac number, because 54645509 - 2¹² = 54641413 is a prime.

It is a super-2 number, since 2×54645509² = 5972263307738162, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54845509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27322754 + 27322755.

It is an arithmetic number, because the mean of its divisors is an integer number (27322755).

Almost surely, 2^54645509 is an apocalyptic number.

It is an amenable number.

54645509 is a deficient number, since it is larger than the sum of its proper divisors (1).

54645509 is an equidigital number, since it uses as much as digits as its factorization.

54645509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 54645509 is about 7392.2600738881. The cubic root of 54645509 is about 379.4764465840.

The spelling of 54645509 in words is "fifty-four million, six hundred forty-five thousand, five hundred nine".