549139569 has 8 divisors (see below), whose sum is σ = 798748512. Its totient is φ = 332811840.

The previous prime is 549139517. The next prime is 549139579. The reversal of 549139569 is 965931945.

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

It is not a de Polignac number, because 549139569 - 2¹¹ = 549137521 is a prime.

It is a super-2 number, since 2×549139569² = 603108532483011522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (549139579) 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, 8320264 + ... + 8320329.

It is an arithmetic number, because the mean of its divisors is an integer number (99843564).

Almost surely, 2^549139569 is an apocalyptic number.

It is an amenable number.

549139569 is a deficient number, since it is larger than the sum of its proper divisors (249608943).

549139569 is a wasteful number, since it uses less digits than its factorization.

549139569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16640607.

The product of its digits is 1312200, while the sum is 51.

The square root of 549139569 is about 23433.7271683358. The cubic root of 549139569 is about 818.8937934111.

The spelling of 549139569 in words is "five hundred forty-nine million, one hundred thirty-nine thousand, five hundred sixty-nine".