213446773 has 2 divisors, whose sum is σ = 213446774. Its totient is φ = 213446772.

The previous prime is 213446759. The next prime is 213446777. The reversal of 213446773 is 377644312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209149444 + 4297329 = 14462^2 + 2073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213446773 is a prime.

It is a super-2 number, since 2×213446773² = 91119049808227058, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213446777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106723386 + 106723387.

It is an arithmetic number, because the mean of its divisors is an integer number (106723387).

Almost surely, 2^213446773 is an apocalyptic number.

It is an amenable number.

213446773 is a deficient number, since it is larger than the sum of its proper divisors (1).

213446773 is an equidigital number, since it uses as much as digits as its factorization.

213446773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 37.

The square root of 213446773 is about 14609.8176922233. The cubic root of 213446773 is about 597.6265243283.

Adding to 213446773 its product of digits (84672), we get a triangular number (213531445 = T₂₀₆₆₅).

The spelling of 213446773 in words is "two hundred thirteen million, four hundred forty-six thousand, seven hundred seventy-three".