689721502234 has 8 divisors (see below), whose sum is σ = 1062543935988. Its totient is φ = 335540190240.

The previous prime is 689721502163. The next prime is 689721502259. The reversal of 689721502234 is 432205127986.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 554883459025 + 134838043209 = 744905^2 + 367203^2 .

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

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, 4660280347 + ... + 4660280494.

It is a 1-persistent number, because it is pandigital, but 2⋅689721502234 = 1379443004468 is not.

Almost surely, 2^689721502234 is an apocalyptic number.

689721502234 is a deficient number, since it is larger than the sum of its proper divisors (372822433754).

689721502234 is a wasteful number, since it uses less digits than its factorization.

689721502234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9320560880.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 689721502234 in words is "six hundred eighty-nine billion, seven hundred twenty-one million, five hundred two thousand, two hundred thirty-four".