551920993 has 8 divisors (see below), whose sum is σ = 613550336. Its totient is φ = 493030800.

The previous prime is 551920991. The next prime is 551921003. The reversal of 551920993 is 399029155.

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 551920993 - 2¹ = 551920991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551920991) 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, 684363 + ... + 685168.

It is an arithmetic number, because the mean of its divisors is an integer number (76693792).

Almost surely, 2^551920993 is an apocalyptic number.

It is an amenable number.

551920993 is a deficient number, since it is larger than the sum of its proper divisors (61629343).

551920993 is a wasteful number, since it uses less digits than its factorization.

551920993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369575.

The product of its (nonzero) digits is 109350, while the sum is 43.

The square root of 551920993 is about 23492.9988081556. The cubic root of 551920993 is about 820.2740473075.

The spelling of 551920993 in words is "five hundred fifty-one million, nine hundred twenty thousand, nine hundred ninety-three".