54389493 has 12 divisors (see below), whose sum is σ = 80479308. Its totient is φ = 35375040.

The previous prime is 54389483. The next prime is 54389507. The reversal of 54389493 is 39498345.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18173169 + 36216324 = 4263^2 + 6018^2 .

It is a de Polignac number, because none of the positive numbers 2^k-54389493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54389473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73330 + ... + 74067.

It is an arithmetic number, because the mean of its divisors is an integer number (6706609).

Almost surely, 2^54389493 is an apocalyptic number.

It is an amenable number.

54389493 is a deficient number, since it is larger than the sum of its proper divisors (26089815).

54389493 is a wasteful number, since it uses less digits than its factorization.

54389493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147444 (or 147441 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 54389493 is about 7374.9232538380. The cubic root of 54389493 is about 378.8828988248.

The spelling of 54389493 in words is "fifty-four million, three hundred eighty-nine thousand, four hundred ninety-three".