1913105 has 4 divisors (see below), whose sum is σ = 2295732. Its totient is φ = 1530480.

The previous prime is 1913099. The next prime is 1913123. The reversal of 1913105 is 5013191.

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 1329409 + 583696 = 1153^2 + 764^2 .

It is not a de Polignac number, because 1913105 - 2⁴ = 1913089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191306 + ... + 191315.

It is an arithmetic number, because the mean of its divisors is an integer number (573933).

2^1913105 is an apocalyptic number.

It is an amenable number.

1913105 is a deficient number, since it is larger than the sum of its proper divisors (382627).

1913105 is an equidigital number, since it uses as much as digits as its factorization.

1913105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 382626.

The product of its (nonzero) digits is 135, while the sum is 20.

The square root of 1913105 is about 1383.1503895094. The cubic root of 1913105 is about 124.1403414505.

Adding to 1913105 its reverse (5013191), we get a palindrome (6926296).

The spelling of 1913105 in words is "one million, nine hundred thirteen thousand, one hundred five".