68157099 has 16 divisors (see below), whose sum is σ = 102880800. Its totient is φ = 44579808.

The previous prime is 68157083. The next prime is 68157109. The reversal of 68157099 is 99075186.

It is not a de Polignac number, because 68157099 - 2⁴ = 68157083 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (68157059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22384 + ... + 25245.

It is an arithmetic number, because the mean of its divisors is an integer number (6430050).

Almost surely, 2^68157099 is an apocalyptic number.

68157099 is a deficient number, since it is larger than the sum of its proper divisors (34723701).

68157099 is a wasteful number, since it uses less digits than its factorization.

68157099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47691 (or 47685 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 68157099 is about 8255.7312819641. The cubic root of 68157099 is about 408.4795939003.

The spelling of 68157099 in words is "sixty-eight million, one hundred fifty-seven thousand, ninety-nine".