213889453 has 2 divisors, whose sum is σ = 213889454. Its totient is φ = 213889452.

The previous prime is 213889411. The next prime is 213889457. The reversal of 213889453 is 354988312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176703849 + 37185604 = 13293^2 + 6098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213889453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213889457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106944726 + 106944727.

It is an arithmetic number, because the mean of its divisors is an integer number (106944727).

Almost surely, 2^213889453 is an apocalyptic number.

It is an amenable number.

213889453 is a deficient number, since it is larger than the sum of its proper divisors (1).

213889453 is an equidigital number, since it uses as much as digits as its factorization.

213889453 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 43.

The square root of 213889453 is about 14624.9599315690. The cubic root of 213889453 is about 598.0393901414.

The spelling of 213889453 in words is "two hundred thirteen million, eight hundred eighty-nine thousand, four hundred fifty-three".