1831013 has 2 divisors, whose sum is σ = 1831014. Its totient is φ = 1831012.

The previous prime is 1831009. The next prime is 1831021. The reversal of 1831013 is 3101381.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1643524 + 187489 = 1282^2 + 433^2 .

It is a cyclic number.

It is not a de Polignac number, because 1831013 - 2² = 1831009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1830982 and 1831000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1831003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 915506 + 915507.

It is an arithmetic number, because the mean of its divisors is an integer number (915507).

2^1831013 is an apocalyptic number.

It is an amenable number.

1831013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1831013 is an equidigital number, since it uses as much as digits as its factorization.

1831013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 1831013 is about 1353.1492896203. The cubic root of 1831013 is about 122.3386853469.

Adding to 1831013 its reverse (3101381), we get a palindrome (4932394).

The spelling of 1831013 in words is "one million, eight hundred thirty-one thousand, thirteen".