213420733 has 2 divisors, whose sum is σ = 213420734. Its totient is φ = 213420732.

The previous prime is 213420721. The next prime is 213420743. The reversal of 213420733 is 337024312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191490244 + 21930489 = 13838^2 + 4683^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213420733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213420698 and 213420707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213420743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106710366 + 106710367.

It is an arithmetic number, because the mean of its divisors is an integer number (106710367).

Almost surely, 2^213420733 is an apocalyptic number.

It is an amenable number.

213420733 is a deficient number, since it is larger than the sum of its proper divisors (1).

213420733 is an equidigital number, since it uses as much as digits as its factorization.

213420733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 25.

The square root of 213420733 is about 14608.9264834895. The cubic root of 213420733 is about 597.6022203338.

The spelling of 213420733 in words is "two hundred thirteen million, four hundred twenty thousand, seven hundred thirty-three".