688005001 has 2 divisors, whose sum is σ = 688005002. Its totient is φ = 688005000.

The previous prime is 688004951. The next prime is 688005023. The reversal of 688005001 is 100500886.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 686440000 + 1565001 = 26200^2 + 1251^2 .

It is a cyclic number.

It is not a de Polignac number, because 688005001 - 2⁷ = 688004873 is a prime.

It is not a weakly prime, because it can be changed into another prime (688005091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344002500 + 344002501.

It is an arithmetic number, because the mean of its divisors is an integer number (344002501).

Almost surely, 2^688005001 is an apocalyptic number.

It is an amenable number.

688005001 is a deficient number, since it is larger than the sum of its proper divisors (1).

688005001 is an equidigital number, since it uses as much as digits as its factorization.

688005001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 688005001 is about 26229.8494277035. The cubic root of 688005001 is about 882.8031314792.

Adding to 688005001 its reverse (100500886), we get a palindrome (788505887).

The spelling of 688005001 in words is "six hundred eighty-eight million, five thousand, one".