550907999 has 4 divisors (see below), whose sum is σ = 551059080. Its totient is φ = 550756920.

The previous prime is 550907989. The next prime is 550908047. The reversal of 550907999 is 999709055.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 550907999 - 2⁸ = 550907743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 550907999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550907989) 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, 69932 + ... + 77409.

It is an arithmetic number, because the mean of its divisors is an integer number (137764770).

Almost surely, 2^550907999 is an apocalyptic number.

550907999 is a deficient number, since it is larger than the sum of its proper divisors (151081).

550907999 is a wasteful number, since it uses less digits than its factorization.

550907999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151080.

The product of its (nonzero) digits is 1148175, while the sum is 53.

The square root of 550907999 is about 23471.4294196157. The cubic root of 550907999 is about 819.7718971921.

The spelling of 550907999 in words is "five hundred fifty million, nine hundred seven thousand, nine hundred ninety-nine".