64091109 has 4 divisors (see below), whose sum is σ = 85454816. Its totient is φ = 42727404.

The previous prime is 64091107. The next prime is 64091117. The reversal of 64091109 is 90119046.

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 not a de Polignac number, because 64091109 - 2¹ = 64091107 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 (64091107) 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 3 ways as a sum of consecutive naturals, for example, 10681849 + ... + 10681854.

It is an arithmetic number, because the mean of its divisors is an integer number (21363704).

Almost surely, 2^64091109 is an apocalyptic number.

It is an amenable number.

64091109 is a deficient number, since it is larger than the sum of its proper divisors (21363707).

64091109 is a wasteful number, since it uses less digits than its factorization.

64091109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21363706.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 64091109 is about 8005.6922873665. The cubic root of 64091109 is about 400.1897204178.

The spelling of 64091109 in words is "sixty-four million, ninety-one thousand, one hundred nine".