68203657 has 2 divisors, whose sum is σ = 68203658. Its totient is φ = 68203656.

The previous prime is 68203651. The next prime is 68203687. The reversal of 68203657 is 75630286.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55890576 + 12313081 = 7476^2 + 3509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68203657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68203651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34101828 + 34101829.

It is an arithmetic number, because the mean of its divisors is an integer number (34101829).

Almost surely, 2^68203657 is an apocalyptic number.

It is an amenable number.

68203657 is a deficient number, since it is larger than the sum of its proper divisors (1).

68203657 is an equidigital number, since it uses as much as digits as its factorization.

68203657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 68203657 is about 8258.5505386841. The cubic root of 68203657 is about 408.5725833050.

The spelling of 68203657 in words is "sixty-eight million, two hundred three thousand, six hundred fifty-seven".