1913813 has 8 divisors (see below), whose sum is σ = 2197920. Its totient is φ = 1648080.

The previous prime is 1913803. The next prime is 1913819. The reversal of 1913813 is 3183191.

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

It is a cyclic number.

It is not a de Polignac number, because 1913813 - 2⁶ = 1913749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913819) 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 7 ways as a sum of consecutive naturals, for example, 4370 + ... + 4787.

It is an arithmetic number, because the mean of its divisors is an integer number (274740).

2^1913813 is an apocalyptic number.

It is an amenable number.

1913813 is a deficient number, since it is larger than the sum of its proper divisors (284107).

1913813 is a wasteful number, since it uses less digits than its factorization.

1913813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9187.

The product of its digits is 648, while the sum is 26.

The square root of 1913813 is about 1383.4063032963. The cubic root of 1913813 is about 124.1556534732.

It can be divided in two parts, 191 and 3813, that added together give a palindrome (4004).

The spelling of 1913813 in words is "one million, nine hundred thirteen thousand, eight hundred thirteen".