213760609 has 2 divisors, whose sum is σ = 213760610. Its totient is φ = 213760608.

The previous prime is 213760579. The next prime is 213760627. The reversal of 213760609 is 906067312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 173501584 + 40259025 = 13172^2 + 6345^2 .

It is a cyclic number.

It is not a de Polignac number, because 213760609 - 2⁵ = 213760577 is a prime.

It is not a weakly prime, because it can be changed into another prime (213760639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106880304 + 106880305.

It is an arithmetic number, because the mean of its divisors is an integer number (106880305).

Almost surely, 2^213760609 is an apocalyptic number.

It is an amenable number.

213760609 is a deficient number, since it is larger than the sum of its proper divisors (1).

213760609 is an equidigital number, since it uses as much as digits as its factorization.

213760609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 213760609 is about 14620.5543328562. The cubic root of 213760609 is about 597.9192825137.

It can be divided in two parts, 213760 and 609, that added together give a square (214369 = 463²).

The spelling of 213760609 in words is "two hundred thirteen million, seven hundred sixty thousand, six hundred nine".