68109149 has 4 divisors (see below), whose sum is σ = 68138400. Its totient is φ = 68079900.

The previous prime is 68109131. The next prime is 68109163. The reversal of 68109149 is 94190186.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94190186 = 2 ⋅47095093.

It is a cyclic number.

It is not a de Polignac number, because 68109149 - 2²⁴ = 51331933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68109109) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10799 + ... + 15900.

It is an arithmetic number, because the mean of its divisors is an integer number (17034600).

Almost surely, 2^68109149 is an apocalyptic number.

It is an amenable number.

68109149 is a deficient number, since it is larger than the sum of its proper divisors (29251).

68109149 is a wasteful number, since it uses less digits than its factorization.

68109149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29250.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 68109149 is about 8252.8267278551. The cubic root of 68109149 is about 408.3837800046.

The spelling of 68109149 in words is "sixty-eight million, one hundred nine thousand, one hundred forty-nine".