549451987 has 8 divisors (see below), whose sum is σ = 628087136. Its totient is φ = 470852352.

The previous prime is 549451939. The next prime is 549452017. The reversal of 549451987 is 789154945.

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

It is a cyclic number.

It is not a de Polignac number, because 549451987 - 2¹⁹ = 548927699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549451927) 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, 53773 + ... + 63169.

It is an arithmetic number, because the mean of its divisors is an integer number (78510892).

Almost surely, 2^549451987 is an apocalyptic number.

549451987 is a deficient number, since it is larger than the sum of its proper divisors (78635149).

549451987 is an equidigital number, since it uses as much as digits as its factorization.

549451987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17757.

The product of its digits is 1814400, while the sum is 52.

The square root of 549451987 is about 23440.3922108825. The cubic root of 549451987 is about 819.0490597427.

The spelling of 549451987 in words is "five hundred forty-nine million, four hundred fifty-one thousand, nine hundred eighty-seven".