551634389 has 4 divisors (see below), whose sum is σ = 551865600. Its totient is φ = 551403180.

The previous prime is 551634379. The next prime is 551634439. The reversal of 551634389 is 983436155.

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 551634389 - 2⁴ = 551634373 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 (551634379) 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 3 ways as a sum of consecutive naturals, for example, 111989 + ... + 116810.

It is an arithmetic number, because the mean of its divisors is an integer number (137966400).

Almost surely, 2^551634389 is an apocalyptic number.

It is an amenable number.

551634389 is a deficient number, since it is larger than the sum of its proper divisors (231211).

551634389 is a wasteful number, since it uses less digits than its factorization.

551634389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231210.

The product of its digits is 388800, while the sum is 44.

The square root of 551634389 is about 23486.8982413600. The cubic root of 551634389 is about 820.1320375324.

The spelling of 551634389 in words is "five hundred fifty-one million, six hundred thirty-four thousand, three hundred eighty-nine".