1955109 has 8 divisors (see below), whose sum is σ = 2807392. Its totient is φ = 1203120.

The previous prime is 1955099. The next prime is 1955113. The reversal of 1955109 is 9015591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1955109 - 2⁹ = 1954597 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 (1955179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25027 + ... + 25104.

It is an arithmetic number, because the mean of its divisors is an integer number (350924).

2^1955109 is an apocalyptic number.

It is an amenable number.

1955109 is a deficient number, since it is larger than the sum of its proper divisors (852283).

1955109 is a wasteful number, since it uses less digits than its factorization.

1955109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50147.

The product of its (nonzero) digits is 2025, while the sum is 30.

The square root of 1955109 is about 1398.2521231881. The cubic root of 1955109 is about 125.0423110099.

The spelling of 1955109 in words is "one million, nine hundred fifty-five thousand, one hundred nine".