68690071 has 2 divisors, whose sum is σ = 68690072. Its totient is φ = 68690070.

The previous prime is 68690057. The next prime is 68690123. The reversal of 68690071 is 17009686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68690071 - 2²¹ = 66592919 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68690071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68690371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34345035 + 34345036.

It is an arithmetic number, because the mean of its divisors is an integer number (34345036).

Almost surely, 2^68690071 is an apocalyptic number.

68690071 is a deficient number, since it is larger than the sum of its proper divisors (1).

68690071 is an equidigital number, since it uses as much as digits as its factorization.

68690071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 68690071 is about 8287.9473333269. The cubic root of 68690071 is about 409.5415677163.

The spelling of 68690071 in words is "sixty-eight million, six hundred ninety thousand, seventy-one".