1689387027 has 8 divisors (see below), whose sum is σ = 2256088320. Its totient is φ = 1124471880.

The previous prime is 1689387013. The next prime is 1689387041. The reversal of 1689387027 is 7207839861.

It is an interprime number because it is at equal distance from previous prime (1689387013) and next prime (1689387041).

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

It is not a de Polignac number, because 1689387027 - 2⁷ = 1689386899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1689380027) 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, 444327 + ... + 448112.

It is an arithmetic number, because the mean of its divisors is an integer number (282011040).

Almost surely, 2^1689387027 is an apocalyptic number.

1689387027 is a deficient number, since it is larger than the sum of its proper divisors (566701293).

1689387027 is an equidigital number, since it uses as much as digits as its factorization.

1689387027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893073.

The product of its (nonzero) digits is 1016064, while the sum is 51.

The square root of 1689387027 is about 41102.1535567177. The cubic root of 1689387027 is about 1190.9943967967.

The spelling of 1689387027 in words is "one billion, six hundred eighty-nine million, three hundred eighty-seven thousand, twenty-seven".