689677505 has 32 divisors (see below), whose sum is σ = 968163840. Its totient is φ = 466053120.

The previous prime is 689677489. The next prime is 689677511. The reversal of 689677505 is 505776986.

It is a happy number.

It is not a de Polignac number, because 689677505 - 2⁴ = 689677489 is a prime.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69197 + ... + 78533.

It is an arithmetic number, because the mean of its divisors is an integer number (30255120).

Almost surely, 2^689677505 is an apocalyptic number.

It is an amenable number.

689677505 is a deficient number, since it is larger than the sum of its proper divisors (278486335).

689677505 is a wasteful number, since it uses less digits than its factorization.

689677505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9449.

The product of its (nonzero) digits is 3175200, while the sum is 53.

The square root of 689677505 is about 26261.7117682759. The cubic root of 689677505 is about 883.5179019412.

The spelling of 689677505 in words is "six hundred eighty-nine million, six hundred seventy-seven thousand, five hundred five".