687346801 has 2 divisors, whose sum is σ = 687346802. Its totient is φ = 687346800.

The previous prime is 687346763. The next prime is 687346843. The reversal of 687346801 is 108643786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 681471025 + 5875776 = 26105^2 + 2424^2 .

It is a cyclic number.

It is not a de Polignac number, because 687346801 - 2¹⁷ = 687215729 is a prime.

It is not a weakly prime, because it can be changed into another prime (687346861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343673400 + 343673401.

It is an arithmetic number, because the mean of its divisors is an integer number (343673401).

Almost surely, 2^687346801 is an apocalyptic number.

It is an amenable number.

687346801 is a deficient number, since it is larger than the sum of its proper divisors (1).

687346801 is an equidigital number, since it uses as much as digits as its factorization.

687346801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 687346801 is about 26217.2996511845. The cubic root of 687346801 is about 882.5215218906.

The spelling of 687346801 in words is "six hundred eighty-seven million, three hundred forty-six thousand, eight hundred one".