1689550229929 has 3 divisors (see below), whose sum is σ = 1689551529757. Its totient is φ = 1689548930102.

The previous prime is 1689550229903. The next prime is 1689550229957. The reversal of 1689550229929 is 9299220559861.

It is a happy number.

The square root of 1689550229929 is 1299827.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1689550229929 - 2¹¹ = 1689550227881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1689550229729) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 649914 + ... + 1949740.

Almost surely, 2^{1689550229929} is an apocalyptic number.

1689550229929 is the 1299827-th square number.

1689550229929 is the 649914-th centered octagonal number.

It is an amenable number.

1689550229929 is a deficient number, since it is larger than the sum of its proper divisors (1299828).

1689550229929 is an frugal number, since it uses more digits than its factorization.

1689550229929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599654 (or 1299827 counting only the distinct ones).

The product of its (nonzero) digits is 62985600, while the sum is 67.

The spelling of 1689550229929 in words is "one trillion, six hundred eighty-nine billion, five hundred fifty million, two hundred twenty-nine thousand, nine hundred twenty-nine".