109689479427 has 16 divisors (see below), whose sum is σ = 159751101312. Its totient is φ = 66393985920.

The previous prime is 109689479381. The next prime is 109689479453. The reversal of 109689479427 is 724974986901.

It is a happy number.

It is not a de Polignac number, because 109689479427 - 2⁷ = 109689479299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109689479477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085798 + ... + 2137739.

It is an arithmetic number, because the mean of its divisors is an integer number (9984443832).

Almost surely, 2^109689479427 is an apocalyptic number.

109689479427 is a deficient number, since it is larger than the sum of its proper divisors (50061621885).

109689479427 is a wasteful number, since it uses less digits than its factorization.

109689479427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4224338.

The product of its (nonzero) digits is 54867456, while the sum is 66.

The spelling of 109689479427 in words is "one hundred nine billion, six hundred eighty-nine million, four hundred seventy-nine thousand, four hundred twenty-seven".