1954109 has 4 divisors (see below), whose sum is σ = 1971516. Its totient is φ = 1936704.

The previous prime is 1954097. The next prime is 1954111. The reversal of 1954109 is 9014591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55225 + 1898884 = 235^2 + 1378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1954109 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 (1954159) 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, 8534 + ... + 8759.

It is an arithmetic number, because the mean of its divisors is an integer number (492879).

2^1954109 is an apocalyptic number.

It is an amenable number.

1954109 is a deficient number, since it is larger than the sum of its proper divisors (17407).

1954109 is a wasteful number, since it uses less digits than its factorization.

1954109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17406.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 1954109 is about 1397.8944881499. The cubic root of 1954109 is about 125.0209884757.

The spelling of 1954109 in words is "one million, nine hundred fifty-four thousand, one hundred nine".