689115874 has 4 divisors (see below), whose sum is σ = 1033673814. Its totient is φ = 344557936.

The previous prime is 689115853. The next prime is 689115877. The reversal of 689115874 is 478511986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 478511986 = 2 ⋅239255993.

It can be written as a sum of positive squares in only one way, i.e., 598047025 + 91068849 = 24455^2 + 9543^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (689115877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172278967 + ... + 172278970.

Almost surely, 2^689115874 is an apocalyptic number.

689115874 is a deficient number, since it is larger than the sum of its proper divisors (344557940).

689115874 is a wasteful number, since it uses less digits than its factorization.

689115874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344557939.

The product of its digits is 483840, while the sum is 49.

The square root of 689115874 is about 26251.0166279327. The cubic root of 689115874 is about 883.2780092403.

The spelling of 689115874 in words is "six hundred eighty-nine million, one hundred fifteen thousand, eight hundred seventy-four".