68249899 has 2 divisors, whose sum is σ = 68249900. Its totient is φ = 68249898.

The previous prime is 68249891. The next prime is 68249921. The reversal of 68249899 is 99894286.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68249899 - 2³ = 68249891 is a prime.

It is not a weakly prime, because it can be changed into another prime (68249891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34124949 + 34124950.

It is an arithmetic number, because the mean of its divisors is an integer number (34124950).

Almost surely, 2^68249899 is an apocalyptic number.

68249899 is a deficient number, since it is larger than the sum of its proper divisors (1).

68249899 is an equidigital number, since it uses as much as digits as its factorization.

68249899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 55.

The square root of 68249899 is about 8261.3497081288. The cubic root of 68249899 is about 408.6648996899.

The spelling of 68249899 in words is "sixty-eight million, two hundred forty-nine thousand, eight hundred ninety-nine".