213373109 has 2 divisors, whose sum is σ = 213373110. Its totient is φ = 213373108.

The previous prime is 213373079. The next prime is 213373129. The reversal of 213373109 is 901373312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111302500 + 102070609 = 10550^2 + 10103^2 .

It is a cyclic number.

It is not a de Polignac number, because 213373109 - 2²⁰ = 212324533 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213373129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106686554 + 106686555.

It is an arithmetic number, because the mean of its divisors is an integer number (106686555).

Almost surely, 2^213373109 is an apocalyptic number.

It is an amenable number.

213373109 is a deficient number, since it is larger than the sum of its proper divisors (1).

213373109 is an equidigital number, since it uses as much as digits as its factorization.

213373109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 29.

The square root of 213373109 is about 14607.2964302091. The cubic root of 213373109 is about 597.5577661627.

The spelling of 213373109 in words is "two hundred thirteen million, three hundred seventy-three thousand, one hundred nine".