68849999 has 2 divisors, whose sum is σ = 68850000. Its totient is φ = 68849998.

The previous prime is 68849993. The next prime is 68850011. The reversal of 68849999 is 99994886.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68849999 is a prime.

68849999 is a modest number, since divided by 9999 gives 6884 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68849993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34424999 + 34425000.

It is an arithmetic number, because the mean of its divisors is an integer number (34425000).

Almost surely, 2^68849999 is an apocalyptic number.

68849999 is a deficient number, since it is larger than the sum of its proper divisors (1).

68849999 is an equidigital number, since it uses as much as digits as its factorization.

68849999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10077696, while the sum is 62.

The square root of 68849999 is about 8297.5899513051. The cubic root of 68849999 is about 409.8591604299.

The spelling of 68849999 in words is "sixty-eight million, eight hundred forty-nine thousand, nine hundred ninety-nine".