1912813 has 12 divisors (see below), whose sum is σ = 2252640. Its totient is φ = 1619352.

The previous prime is 1912763. The next prime is 1912829. The reversal of 1912813 is 3182191.

It is not a de Polignac number, because 1912813 - 2⁹ = 1912301 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 (1912843) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4858 + ... + 5236.

It is an arithmetic number, because the mean of its divisors is an integer number (187720).

2^1912813 is an apocalyptic number.

It is an amenable number.

1912813 is a deficient number, since it is larger than the sum of its proper divisors (339827).

1912813 is a wasteful number, since it uses less digits than its factorization.

1912813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 489 counting only the distinct ones).

The product of its digits is 432, while the sum is 25.

The square root of 1912813 is about 1383.0448293530. The cubic root of 1912813 is about 124.1340252221.

The spelling of 1912813 in words is "one million, nine hundred twelve thousand, eight hundred thirteen".