1213829 has 2 divisors, whose sum is σ = 1213830. Its totient is φ = 1213828.

The previous prime is 1213801. The next prime is 1213837. The reversal of 1213829 is 9283121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1151329 + 62500 = 1073^2 + 250^2 .

It is a cyclic number.

It is not a de Polignac number, because 1213829 - 2⁸ = 1213573 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1213798 and 1213807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1213879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606914 + 606915.

It is an arithmetic number, because the mean of its divisors is an integer number (606915).

2^1213829 is an apocalyptic number.

It is an amenable number.

1213829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213829 is an equidigital number, since it uses as much as digits as its factorization.

1213829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 1213829 is about 1101.7390798188. The cubic root of 1213829 is about 106.6725072757.

It can be divided in two parts, 12138 and 29, that added together give a cube (12167 = 23³).

The spelling of 1213829 in words is "one million, two hundred thirteen thousand, eight hundred twenty-nine".