549297993 has 8 divisors (see below), whose sum is σ = 732652000. Its totient is φ = 366071328.

The previous prime is 549297971. The next prime is 549297997. The reversal of 549297993 is 399792945.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 549297993 - 2⁶ = 549297929 is a prime.

It is a super-3 number, since 3×549297993³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549297997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21268 + ... + 39381.

It is an arithmetic number, because the mean of its divisors is an integer number (91581500).

Almost surely, 2^549297993 is an apocalyptic number.

It is an amenable number.

549297993 is a deficient number, since it is larger than the sum of its proper divisors (183354007).

549297993 is a wasteful number, since it uses less digits than its factorization.

549297993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63671.

The product of its digits is 5511240, while the sum is 57.

The square root of 549297993 is about 23437.1071807081. The cubic root of 549297993 is about 818.9725347511.

The spelling of 549297993 in words is "five hundred forty-nine million, two hundred ninety-seven thousand, nine hundred ninety-three".