1913133 has 4 divisors (see below), whose sum is σ = 2550848. Its totient is φ = 1275420.

The previous prime is 1913123. The next prime is 1913147. The reversal of 1913133 is 3313191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1913133 - 2⁶ = 1913069 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913123) 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 3 ways as a sum of consecutive naturals, for example, 318853 + ... + 318858.

It is an arithmetic number, because the mean of its divisors is an integer number (637712).

2^1913133 is an apocalyptic number.

It is an amenable number.

1913133 is a deficient number, since it is larger than the sum of its proper divisors (637715).

1913133 is an equidigital number, since it uses as much as digits as its factorization.

1913133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637714.

The product of its digits is 243, while the sum is 21.

The square root of 1913133 is about 1383.1605112929. The cubic root of 1913133 is about 124.1409470824.

The spelling of 1913133 in words is "one million, nine hundred thirteen thousand, one hundred thirty-three".