551979609 has 8 divisors (see below), whose sum is σ = 751632000. Its totient is φ = 360156816.

The previous prime is 551979607. The next prime is 551979611. The reversal of 551979609 is 906979155.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (551979607) and next prime (551979611).

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

It is not a de Polignac number, because 551979609 - 2¹ = 551979607 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (551979601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1957234 + ... + 1957515.

It is an arithmetic number, because the mean of its divisors is an integer number (93954000).

Almost surely, 2^551979609 is an apocalyptic number.

It is an amenable number.

551979609 is a deficient number, since it is larger than the sum of its proper divisors (199652391).

551979609 is a wasteful number, since it uses less digits than its factorization.

551979609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914799.

The product of its (nonzero) digits is 765450, while the sum is 51.

The square root of 551979609 is about 23494.2462956359. The cubic root of 551979609 is about 820.3030849670.

The spelling of 551979609 in words is "five hundred fifty-one million, nine hundred seventy-nine thousand, six hundred nine".