689607777 has 8 divisors (see below), whose sum is σ = 920550880. Its totient is φ = 459201600.

The previous prime is 689607769. The next prime is 689607797. The reversal of 689607777 is 777706986.

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

It is not a de Polignac number, because 689607777 - 2³ = 689607769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689607707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131224 + ... + 136377.

It is an arithmetic number, because the mean of its divisors is an integer number (115068860).

Almost surely, 2^689607777 is an apocalyptic number.

It is an amenable number.

689607777 is a deficient number, since it is larger than the sum of its proper divisors (230943103).

689607777 is a wasteful number, since it uses less digits than its factorization.

689607777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268463.

The product of its (nonzero) digits is 6223392, while the sum is 57.

The square root of 689607777 is about 26260.3841746460. The cubic root of 689607777 is about 883.4881256994.

The spelling of 689607777 in words is "six hundred eighty-nine million, six hundred seven thousand, seven hundred seventy-seven".