213932489 has 2 divisors, whose sum is σ = 213932490. Its totient is φ = 213932488.

The previous prime is 213932479. The next prime is 213932497. The reversal of 213932489 is 984239312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136492489 + 77440000 = 11683^2 + 8800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213932489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213932479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106966244 + 106966245.

It is an arithmetic number, because the mean of its divisors is an integer number (106966245).

Almost surely, 2^213932489 is an apocalyptic number.

It is an amenable number.

213932489 is a deficient number, since it is larger than the sum of its proper divisors (1).

213932489 is an equidigital number, since it uses as much as digits as its factorization.

213932489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 41.

The square root of 213932489 is about 14626.4311778369. The cubic root of 213932489 is about 598.0794973040.

The spelling of 213932489 in words is "two hundred thirteen million, nine hundred thirty-two thousand, four hundred eighty-nine".