1686480737 has 2 divisors, whose sum is σ = 1686480738. Its totient is φ = 1686480736.

The previous prime is 1686480673. The next prime is 1686480739. The reversal of 1686480737 is 7370846861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1426497361 + 259983376 = 37769^2 + 16124^2 .

It is a cyclic number.

It is not a de Polignac number, because 1686480737 - 2⁶ = 1686480673 is a prime.

Together with 1686480739, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1686480739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843240368 + 843240369.

It is an arithmetic number, because the mean of its divisors is an integer number (843240369).

Almost surely, 2^1686480737 is an apocalyptic number.

It is an amenable number.

1686480737 is a deficient number, since it is larger than the sum of its proper divisors (1).

1686480737 is an equidigital number, since it uses as much as digits as its factorization.

1686480737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 50.

The square root of 1686480737 is about 41066.7838648219. The cubic root of 1686480737 is about 1190.3110400835.

The spelling of 1686480737 in words is "one billion, six hundred eighty-six million, four hundred eighty thousand, seven hundred thirty-seven".