68471149 has 2 divisors, whose sum is σ = 68471150. Its totient is φ = 68471148.

The previous prime is 68471147. The next prime is 68471159. The reversal of 68471149 is 94117486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65853225 + 2617924 = 8115^2 + 1618^2 .

It is a cyclic number.

It is not a de Polignac number, because 68471149 - 2¹ = 68471147 is a prime.

Together with 68471147, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68471147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34235574 + 34235575.

It is an arithmetic number, because the mean of its divisors is an integer number (34235575).

Almost surely, 2^68471149 is an apocalyptic number.

It is an amenable number.

68471149 is a deficient number, since it is larger than the sum of its proper divisors (1).

68471149 is an equidigital number, since it uses as much as digits as its factorization.

68471149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 40.

The square root of 68471149 is about 8274.7295424080. The cubic root of 68471149 is about 409.1060216175.

The spelling of 68471149 in words is "sixty-eight million, four hundred seventy-one thousand, one hundred forty-nine".