1820633 has 2 divisors, whose sum is σ = 1820634. Its totient is φ = 1820632.

The previous prime is 1820629. The next prime is 1820641. The reversal of 1820633 is 3360281.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1261129 + 559504 = 1123^2 + 748^2 .

It is a cyclic number.

It is not a de Polignac number, because 1820633 - 2² = 1820629 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1820599 and 1820608.

It is not a weakly prime, because it can be changed into another prime (1820033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 910316 + 910317.

It is an arithmetic number, because the mean of its divisors is an integer number (910317).

2^1820633 is an apocalyptic number.

It is an amenable number.

1820633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1820633 is an equidigital number, since it uses as much as digits as its factorization.

1820633 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1820633 is about 1349.3083413364. The cubic root of 1820633 is about 122.1070680620.

The spelling of 1820633 in words is "one million, eight hundred twenty thousand, six hundred thirty-three".