688064277 has 4 divisors (see below), whose sum is σ = 917419040. Its totient is φ = 458709516.

The previous prime is 688064261. The next prime is 688064291. The reversal of 688064277 is 772460886.

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 not a de Polignac number, because 688064277 - 2⁴ = 688064261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688064207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114677377 + ... + 114677382.

It is an arithmetic number, because the mean of its divisors is an integer number (229354760).

Almost surely, 2^688064277 is an apocalyptic number.

It is an amenable number.

688064277 is a deficient number, since it is larger than the sum of its proper divisors (229354763).

688064277 is a wasteful number, since it uses less digits than its factorization.

688064277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229354762.

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 688064277 is about 26230.9793374170. The cubic root of 688064277 is about 882.8284837832.

The spelling of 688064277 in words is "six hundred eighty-eight million, sixty-four thousand, two hundred seventy-seven".