1909107 has 6 divisors (see below), whose sum is σ = 2757612. Its totient is φ = 1272732.

The previous prime is 1909091. The next prime is 1909109. The reversal of 1909107 is 7019091.

It is not a de Polignac number, because 1909107 - 2⁴ = 1909091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1909109) 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 5 ways as a sum of consecutive naturals, for example, 106053 + ... + 106070.

It is an arithmetic number, because the mean of its divisors is an integer number (459602).

2^1909107 is an apocalyptic number.

1909107 is a deficient number, since it is larger than the sum of its proper divisors (848505).

1909107 is a wasteful number, since it uses less digits than its factorization.

1909107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212129 (or 212126 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 1909107 is about 1381.7043822757. The cubic root of 1909107 is about 124.0538051272.

It can be divided in two parts, 1909 and 107, that added together give a triangular number (2016 = T₆₃).

The spelling of 1909107 in words is "one million, nine hundred nine thousand, one hundred seven".