549481393 has 2 divisors, whose sum is σ = 549481394. Its totient is φ = 549481392.

The previous prime is 549481367. The next prime is 549481397. The reversal of 549481393 is 393184945.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 539539984 + 9941409 = 23228^2 + 3153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-549481393 is a prime.

It is not a weakly prime, because it can be changed into another prime (549481397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 274740696 + 274740697.

It is an arithmetic number, because the mean of its divisors is an integer number (274740697).

Almost surely, 2^549481393 is an apocalyptic number.

It is an amenable number.

549481393 is a deficient number, since it is larger than the sum of its proper divisors (1).

549481393 is an equidigital number, since it uses as much as digits as its factorization.

549481393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 46.

The square root of 549481393 is about 23441.0194530869. The cubic root of 549481393 is about 819.0636709842.

The spelling of 549481393 in words is "five hundred forty-nine million, four hundred eighty-one thousand, three hundred ninety-three".