54728689 has 2 divisors, whose sum is σ = 54728690. Its totient is φ = 54728688.

The previous prime is 54728647. The next prime is 54728693. The reversal of 54728689 is 98682745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54641664 + 87025 = 7392^2 + 295^2 .

It is a cyclic number.

It is not a de Polignac number, because 54728689 - 2⁷ = 54728561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54768689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27364344 + 27364345.

It is an arithmetic number, because the mean of its divisors is an integer number (27364345).

Almost surely, 2^54728689 is an apocalyptic number.

It is an amenable number.

54728689 is a deficient number, since it is larger than the sum of its proper divisors (1).

54728689 is an equidigital number, since it uses as much as digits as its factorization.

54728689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 49.

The square root of 54728689 is about 7397.8840893866. The cubic root of 54728689 is about 379.6688920944.

Adding to 54728689 its product of digits (967680), we get a square (55696369 = 7463²).

It can be divided in two parts, 5472 and 8689, that added together give a square (14161 = 119²).

The spelling of 54728689 in words is "fifty-four million, seven hundred twenty-eight thousand, six hundred eighty-nine".