54128693 has 2 divisors, whose sum is σ = 54128694. Its totient is φ = 54128692.

The previous prime is 54128687. The next prime is 54128707. The reversal of 54128693 is 39682145.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53904964 + 223729 = 7342^2 + 473^2 .

It is a cyclic number.

It is not a de Polignac number, because 54128693 - 2⁴ = 54128677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54128623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27064346 + 27064347.

It is an arithmetic number, because the mean of its divisors is an integer number (27064347).

Almost surely, 2^54128693 is an apocalyptic number.

It is an amenable number.

54128693 is a deficient number, since it is larger than the sum of its proper divisors (1).

54128693 is an equidigital number, since it uses as much as digits as its factorization.

54128693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 54128693 is about 7357.2204669970. The cubic root of 54128693 is about 378.2763416043.

The spelling of 54128693 in words is "fifty-four million, one hundred twenty-eight thousand, six hundred ninety-three".