68609899 has 2 divisors, whose sum is σ = 68609900. Its totient is φ = 68609898.

The previous prime is 68609869. The next prime is 68609921. The reversal of 68609899 is 99890686.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68609899 - 2⁷ = 68609771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68609819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34304949 + 34304950.

It is an arithmetic number, because the mean of its divisors is an integer number (34304950).

Almost surely, 2^68609899 is an apocalyptic number.

68609899 is a deficient number, since it is larger than the sum of its proper divisors (1).

68609899 is an equidigital number, since it uses as much as digits as its factorization.

68609899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1679616, while the sum is 55.

The square root of 68609899 is about 8283.1092592094. The cubic root of 68609899 is about 409.3821727780.

The spelling of 68609899 in words is "sixty-eight million, six hundred nine thousand, eight hundred ninety-nine".