68101909 has 4 divisors (see below), whose sum is σ = 71686240. Its totient is φ = 64517580.

The previous prime is 68101907. The next prime is 68101931. The reversal of 68101909 is 90910186.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68101909 - 2¹ = 68101907 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68101907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1792137 + ... + 1792174.

It is an arithmetic number, because the mean of its divisors is an integer number (17921560).

Almost surely, 2^68101909 is an apocalyptic number.

It is an amenable number.

68101909 is a deficient number, since it is larger than the sum of its proper divisors (3584331).

68101909 is a wasteful number, since it uses less digits than its factorization.

68101909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584330.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 68101909 is about 8252.3880786109. The cubic root of 68101909 is about 408.3693090983.

The spelling of 68101909 in words is "sixty-eight million, one hundred one thousand, nine hundred nine".