689548077 has 12 divisors (see below), whose sum is σ = 999200124. Its totient is φ = 458228160.

The previous prime is 689548039. The next prime is 689548099. The reversal of 689548077 is 770845986.

689548077 is a `hidden beast` number, since 6 + 8 + 95 + 480 + 77 = 666.

689548077 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4888521 + 684659556 = 2211^2 + 26166^2 .

It is not a de Polignac number, because 689548077 - 2⁷ = 689547949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689548777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119574 + ... + 125207.

It is an arithmetic number, because the mean of its divisors is an integer number (83266677).

Almost surely, 2^689548077 is an apocalyptic number.

It is an amenable number.

689548077 is a deficient number, since it is larger than the sum of its proper divisors (309652047).

689548077 is a wasteful number, since it uses less digits than its factorization.

689548077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245100 (or 245097 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 54.

The square root of 689548077 is about 26259.2474568484. The cubic root of 689548077 is about 883.4626301617.

The spelling of 689548077 in words is "six hundred eighty-nine million, five hundred forty-eight thousand, seventy-seven".