551687889 has 8 divisors (see below), whose sum is σ = 744895360. Its totient is φ = 363136176.

The previous prime is 551687869. The next prime is 551687897. The reversal of 551687889 is 988786155.

It is a happy number.

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

It is not a de Polignac number, because 551687889 - 2²¹ = 549590737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551687869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1163662 + ... + 1164135.

It is an arithmetic number, because the mean of its divisors is an integer number (93111920).

Almost surely, 2^551687889 is an apocalyptic number.

It is an amenable number.

551687889 is a deficient number, since it is larger than the sum of its proper divisors (193207471).

551687889 is a wasteful number, since it uses less digits than its factorization.

551687889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327879.

The product of its digits is 4838400, while the sum is 57.

The square root of 551687889 is about 23488.0371465987. The cubic root of 551687889 is about 820.1585500477.

The spelling of 551687889 in words is "five hundred fifty-one million, six hundred eighty-seven thousand, eight hundred eighty-nine".