68627609 has 2 divisors, whose sum is σ = 68627610. Its totient is φ = 68627608.

The previous prime is 68627593. The next prime is 68627617. The reversal of 68627609 is 90672686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64048009 + 4579600 = 8003^2 + 2140^2 .

It is a cyclic number.

It is not a de Polignac number, because 68627609 - 2⁴ = 68627593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68627609.

It is not a weakly prime, because it can be changed into another prime (68627509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34313804 + 34313805.

It is an arithmetic number, because the mean of its divisors is an integer number (34313805).

Almost surely, 2^68627609 is an apocalyptic number.

It is an amenable number.

68627609 is a deficient number, since it is larger than the sum of its proper divisors (1).

68627609 is an equidigital number, since it uses as much as digits as its factorization.

68627609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 68627609 is about 8284.1782332347. The cubic root of 68627609 is about 409.4173938110.

The spelling of 68627609 in words is "sixty-eight million, six hundred twenty-seven thousand, six hundred nine".