1913806 has 4 divisors (see below), whose sum is σ = 2870712. Its totient is φ = 956902.

The previous prime is 1913803. The next prime is 1913819. The reversal of 1913806 is 6083191.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1913803) 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 as a sum of consecutive naturals, namely, 478450 + ... + 478453.

It is an arithmetic number, because the mean of its divisors is an integer number (717678).

2^1913806 is an apocalyptic number.

1913806 is a deficient number, since it is larger than the sum of its proper divisors (956906).

1913806 is an equidigital number, since it uses as much as digits as its factorization.

1913806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956905.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1913806 is about 1383.4037733070. The cubic root of 1913806 is about 124.1555021016.

Adding to 1913806 its reverse (6083191), we get a palindrome (7996997).

The spelling of 1913806 in words is "one million, nine hundred thirteen thousand, eight hundred six".