688868030101 has 4 divisors (see below), whose sum is σ = 689019467500. Its totient is φ = 688716592704.

The previous prime is 688868030083. The next prime is 688868030119. The reversal of 688868030101 is 101030868886.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (688868030083) and next prime (688868030119).

It can be written as a sum of positive squares in 2 ways, for example, as 555548113201 + 133319916900 = 745351^2 + 365130^2 .

It is a cyclic number.

It is not a de Polignac number, because 688868030101 - 2⁷ = 688868029973 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 (688868030141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75711876 + ... + 75720973.

It is an arithmetic number, because the mean of its divisors is an integer number (172254866875).

Almost surely, 2^688868030101 is an apocalyptic number.

It is an amenable number.

688868030101 is a deficient number, since it is larger than the sum of its proper divisors (151437399).

688868030101 is a wasteful number, since it uses less digits than its factorization.

688868030101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151437398.

The product of its (nonzero) digits is 442368, while the sum is 49.

Adding to 688868030101 its reverse (101030868886), we get a palindrome (789898898987).

The spelling of 688868030101 in words is "six hundred eighty-eight billion, eight hundred sixty-eight million, thirty thousand, one hundred one".