1913863 has 8 divisors (see below), whose sum is σ = 2196128. Its totient is φ = 1633824.

The previous prime is 1913861. The next prime is 1913867. The reversal of 1913863 is 3683191.

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 1913863 - 2¹ = 1913861 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 (1913861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2245 + ... + 2977.

It is an arithmetic number, because the mean of its divisors is an integer number (274516).

2^1913863 is an apocalyptic number.

1913863 is a deficient number, since it is larger than the sum of its proper divisors (282265).

1913863 is an equidigital number, since it uses as much as digits as its factorization.

1913863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1113.

The product of its digits is 3888, while the sum is 31.

The square root of 1913863 is about 1383.4243745142. The cubic root of 1913863 is about 124.1567346880.

The spelling of 1913863 in words is "one million, nine hundred thirteen thousand, eight hundred sixty-three".