68398505 has 16 divisors (see below), whose sum is σ = 94227840. Its totient is φ = 46689792.

The previous prime is 68398469. The next prime is 68398529. The reversal of 68398505 is 50589386.

It is a cyclic number.

It is not a de Polignac number, because 68398505 - 2⁶ = 68398441 is a prime.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3641 + ... + 12249.

It is an arithmetic number, because the mean of its divisors is an integer number (5889240).

Almost surely, 2^68398505 is an apocalyptic number.

It is an amenable number.

68398505 is a deficient number, since it is larger than the sum of its proper divisors (25829335).

68398505 is a wasteful number, since it uses less digits than its factorization.

68398505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8848.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 68398505 is about 8270.3388685108. The cubic root of 68398505 is about 408.9612910044.

The spelling of 68398505 in words is "sixty-eight million, three hundred ninety-eight thousand, five hundred five".