54135989 has 2 divisors, whose sum is σ = 54135990. Its totient is φ = 54135988.

The previous prime is 54135979. The next prime is 54136037. The reversal of 54135989 is 98953145.

It is a happy number.

54135989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48094225 + 6041764 = 6935^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 54135989 - 2²⁴ = 37358773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54135979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27067994 + 27067995.

It is an arithmetic number, because the mean of its divisors is an integer number (27067995).

Almost surely, 2^54135989 is an apocalyptic number.

It is an amenable number.

54135989 is a deficient number, since it is larger than the sum of its proper divisors (1).

54135989 is an equidigital number, since it uses as much as digits as its factorization.

54135989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 44.

The square root of 54135989 is about 7357.7162897192. The cubic root of 54135989 is about 378.2933367815.

The spelling of 54135989 in words is "fifty-four million, one hundred thirty-five thousand, nine hundred eighty-nine".