555799909 has 4 divisors (see below), whose sum is σ = 635199904. Its totient is φ = 476399916.

The previous prime is 555799891. The next prime is 555799919. The reversal of 555799909 is 909997555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 555799909 - 2⁷ = 555799781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (555799919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39699987 + ... + 39700000.

It is an arithmetic number, because the mean of its divisors is an integer number (158799976).

Almost surely, 2^555799909 is an apocalyptic number.

It is an amenable number.

555799909 is a deficient number, since it is larger than the sum of its proper divisors (79399995).

555799909 is an equidigital number, since it uses as much as digits as its factorization.

555799909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79399994.

The product of its (nonzero) digits is 5740875, while the sum is 58.

The square root of 555799909 is about 23575.4089890292. The cubic root of 555799909 is about 822.1911992603.

The spelling of 555799909 in words is "five hundred fifty-five million, seven hundred ninety-nine thousand, nine hundred nine".