689098729 has 4 divisors (see below), whose sum is σ = 751744080. Its totient is φ = 626453380.

The previous prime is 689098703. The next prime is 689098733. The reversal of 689098729 is 927890986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 689098729 - 2⁷ = 689098601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689098129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31322659 + ... + 31322680.

It is an arithmetic number, because the mean of its divisors is an integer number (187936020).

Almost surely, 2^689098729 is an apocalyptic number.

It is an amenable number.

689098729 is a deficient number, since it is larger than the sum of its proper divisors (62645351).

689098729 is a wasteful number, since it uses less digits than its factorization.

689098729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62645350.

The product of its (nonzero) digits is 3919104, while the sum is 58.

The square root of 689098729 is about 26250.6900671201. The cubic root of 689098729 is about 883.2706839473.

The spelling of 689098729 in words is "six hundred eighty-nine million, ninety-eight thousand, seven hundred twenty-nine".