688322061 has 36 divisors (see below), whose sum is σ = 1224615132. Its totient is φ = 370185984.

The previous prime is 688322059. The next prime is 688322099. The reversal of 688322061 is 160223886.

It can be written as a sum of positive squares in 2 ways, for example, as 645668100 + 42653961 = 25410^2 + 6531^2 .

It is not a de Polignac number, because 688322061 - 2¹ = 688322059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (688322161) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 38410 + ... + 53403.

It is an arithmetic number, because the mean of its divisors is an integer number (34017087).

Almost surely, 2^688322061 is an apocalyptic number.

It is an amenable number.

688322061 is a deficient number, since it is larger than the sum of its proper divisors (536293071).

688322061 is a wasteful number, since it uses less digits than its factorization.

688322061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91850 (or 91840 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 688322061 is about 26235.8926091719. The cubic root of 688322061 is about 882.9387208887.

The spelling of 688322061 in words is "six hundred eighty-eight million, three hundred twenty-two thousand, sixty-one".