1840313 has 2 divisors, whose sum is σ = 1840314. Its totient is φ = 1840312.

The previous prime is 1840297. The next prime is 1840327. The reversal of 1840313 is 3130481.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1763584 + 76729 = 1328^2 + 277^2 .

It is a cyclic number.

It is not a de Polignac number, because 1840313 - 2⁴ = 1840297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1840393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 920156 + 920157.

It is an arithmetic number, because the mean of its divisors is an integer number (920157).

2^1840313 is an apocalyptic number.

It is an amenable number.

1840313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1840313 is an equidigital number, since it uses as much as digits as its factorization.

1840313 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1840313 is about 1356.5813650497. The cubic root of 1840313 is about 122.5454613995.

Adding to 1840313 its reverse (3130481), we get a palindrome (4970794).

The spelling of 1840313 in words is "one million, eight hundred forty thousand, three hundred thirteen".