1918353 has 4 divisors (see below), whose sum is σ = 2557808. Its totient is φ = 1278900.

The previous prime is 1918351. The next prime is 1918363. The reversal of 1918353 is 3538191.

It is a happy number.

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 1918353 - 2¹ = 1918351 is a prime.

It is a D-number.

It is a Duffinian number.

1918353 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1918353.

It is not an unprimeable number, because it can be changed into a prime (1918351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319723 + ... + 319728.

It is an arithmetic number, because the mean of its divisors is an integer number (639452).

2^1918353 is an apocalyptic number.

It is an amenable number.

1918353 is a deficient number, since it is larger than the sum of its proper divisors (639455).

1918353 is an equidigital number, since it uses as much as digits as its factorization.

1918353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 639454.

The product of its digits is 3240, while the sum is 30.

The square root of 1918353 is about 1385.0462086154. The cubic root of 1918353 is about 124.2537510996.

The spelling of 1918353 in words is "one million, nine hundred eighteen thousand, three hundred fifty-three".