3678208657 has 2 divisors, whose sum is σ = 3678208658. Its totient is φ = 3678208656.

The previous prime is 3678208631. The next prime is 3678208663. The reversal of 3678208657 is 7568028763.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2540563216 + 1137645441 = 50404^2 + 33729^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3678208657 is a prime.

It is not a weakly prime, because it can be changed into another prime (3678208627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1839104328 + 1839104329.

It is an arithmetic number, because the mean of its divisors is an integer number (1839104329).

Almost surely, 2^3678208657 is an apocalyptic number.

It is an amenable number.

3678208657 is a deficient number, since it is larger than the sum of its proper divisors (1).

3678208657 is an equidigital number, since it uses as much as digits as its factorization.

3678208657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3386880, while the sum is 52.

The square root of 3678208657 is about 60648.2370477494. The cubic root of 3678208657 is about 1543.6379748963.

The spelling of 3678208657 in words is "three billion, six hundred seventy-eight million, two hundred eight thousand, six hundred fifty-seven".