68776009 has 2 divisors, whose sum is σ = 68776010. Its totient is φ = 68776008.

The previous prime is 68775997. The next prime is 68776013. The reversal of 68776009 is 90067786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67158025 + 1617984 = 8195^2 + 1272^2 .

It is a cyclic number.

It is not a de Polignac number, because 68776009 - 2¹³ = 68767817 is a prime.

It is not a weakly prime, because it can be changed into another prime (68776039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34388004 + 34388005.

It is an arithmetic number, because the mean of its divisors is an integer number (34388005).

Almost surely, 2^68776009 is an apocalyptic number.

It is an amenable number.

68776009 is a deficient number, since it is larger than the sum of its proper divisors (1).

68776009 is an equidigital number, since it uses as much as digits as its factorization.

68776009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 68776009 is about 8293.1302292922. The cubic root of 68776009 is about 409.7122887312.

The spelling of 68776009 in words is "sixty-eight million, seven hundred seventy-six thousand, nine".