1689781414 has 8 divisors (see below), whose sum is σ = 2535743808. Its totient is φ = 844533480.

The previous prime is 1689781369. The next prime is 1689781433. The reversal of 1689781414 is 4141879861.

It is a happy number.

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

It is a super-2 number, since 2×1689781414² = 5710722454199678792, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172662 + ... + 182185.

It is an arithmetic number, because the mean of its divisors is an integer number (316967976).

Almost surely, 2^1689781414 is an apocalyptic number.

1689781414 is a deficient number, since it is larger than the sum of its proper divisors (845962394).

1689781414 is a wasteful number, since it uses less digits than its factorization.

1689781414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357230.

The product of its digits is 387072, while the sum is 49.

The square root of 1689781414 is about 41106.9509207385. The cubic root of 1689781414 is about 1191.0870687053.

The spelling of 1689781414 in words is "one billion, six hundred eighty-nine million, seven hundred eighty-one thousand, four hundred fourteen".