54987173 has 2 divisors, whose sum is σ = 54987174. Its totient is φ = 54987172.

The previous prime is 54987151. The next prime is 54987199. The reversal of 54987173 is 37178945.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49308484 + 5678689 = 7022^2 + 2383^2 .

It is a cyclic number.

It is not a de Polignac number, because 54987173 - 2¹⁸ = 54725029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54987113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27493586 + 27493587.

It is an arithmetic number, because the mean of its divisors is an integer number (27493587).

Almost surely, 2^54987173 is an apocalyptic number.

It is an amenable number.

54987173 is a deficient number, since it is larger than the sum of its proper divisors (1).

54987173 is an equidigital number, since it uses as much as digits as its factorization.

54987173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 54987173 is about 7415.3336405047. Note that the first 3 decimals coincide. The cubic root of 54987173 is about 380.2656798556.

The spelling of 54987173 in words is "fifty-four million, nine hundred eighty-seven thousand, one hundred seventy-three".