213686453 has 2 divisors, whose sum is σ = 213686454. Its totient is φ = 213686452.

The previous prime is 213686449. The next prime is 213686497. The reversal of 213686453 is 354686312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213685924 + 529 = 14618^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 213686453 - 2² = 213686449 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 (213686423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106843226 + 106843227.

It is an arithmetic number, because the mean of its divisors is an integer number (106843227).

Almost surely, 2^213686453 is an apocalyptic number.

It is an amenable number.

213686453 is a deficient number, since it is larger than the sum of its proper divisors (1).

213686453 is an equidigital number, since it uses as much as digits as its factorization.

213686453 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 213686453 is about 14618.0180941193. The cubic root of 213686453 is about 597.8501328377.

The spelling of 213686453 in words is "two hundred thirteen million, six hundred eighty-six thousand, four hundred fifty-three".