68776649 has 2 divisors, whose sum is σ = 68776650. Its totient is φ = 68776648.

The previous prime is 68776627. The next prime is 68776663. The reversal of 68776649 is 94667786.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68641225 + 135424 = 8285^2 + 368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68776649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68776649.

It is not a weakly prime, because it can be changed into another prime (68776349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34388324 + 34388325.

It is an arithmetic number, because the mean of its divisors is an integer number (34388325).

Almost surely, 2^68776649 is an apocalyptic number.

It is an amenable number.

68776649 is a deficient number, since it is larger than the sum of its proper divisors (1).

68776649 is an equidigital number, since it uses as much as digits as its factorization.

68776649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 53.

The square root of 68776649 is about 8293.1688153564. The cubic root of 68776649 is about 409.7135595961.

The spelling of 68776649 in words is "sixty-eight million, seven hundred seventy-six thousand, six hundred forty-nine".