1942813 has 4 divisors (see below), whose sum is σ = 1962940. Its totient is φ = 1922688.

The previous prime is 1942793. The next prime is 1942841. The reversal of 1942813 is 3182491.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 683929 + 1258884 = 827^2 + 1122^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1942813 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 (1942873) 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, 9918 + ... + 10111.

It is an arithmetic number, because the mean of its divisors is an integer number (490735).

2^1942813 is an apocalyptic number.

It is an amenable number.

1942813 is a deficient number, since it is larger than the sum of its proper divisors (20127).

1942813 is an equidigital number, since it uses as much as digits as its factorization.

1942813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20126.

The product of its digits is 1728, while the sum is 28.

The square root of 1942813 is about 1393.8482700782. The cubic root of 1942813 is about 124.7796223646.

The spelling of 1942813 in words is "one million, nine hundred forty-two thousand, eight hundred thirteen".