549873391 has 16 divisors (see below), whose sum is σ = 573492960. Its totient is φ = 526780800.

The previous prime is 549873377. The next prime is 549873439. The reversal of 549873391 is 193378945.

It is a cyclic number.

It is not a de Polignac number, because 549873391 - 2⁹ = 549872879 is a prime.

It is a super-2 number, since 2×549873391² = 604721492259677762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549873301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1004980 + ... + 1005526.

It is an arithmetic number, because the mean of its divisors is an integer number (35843310).

Almost surely, 2^549873391 is an apocalyptic number.

549873391 is a deficient number, since it is larger than the sum of its proper divisors (23619569).

549873391 is a wasteful number, since it uses less digits than its factorization.

549873391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954.

The product of its digits is 816480, while the sum is 49.

The square root of 549873391 is about 23449.3793308053. The cubic root of 549873391 is about 819.2583970203.

The spelling of 549873391 in words is "five hundred forty-nine million, eight hundred seventy-three thousand, three hundred ninety-one".