213398279 has 2 divisors, whose sum is σ = 213398280. Its totient is φ = 213398278.

The previous prime is 213398267. The next prime is 213398309. The reversal of 213398279 is 972893312.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213398279 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 (213391279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106699139 + 106699140.

It is an arithmetic number, because the mean of its divisors is an integer number (106699140).

Almost surely, 2^213398279 is an apocalyptic number.

213398279 is a deficient number, since it is larger than the sum of its proper divisors (1).

213398279 is an equidigital number, since it uses as much as digits as its factorization.

213398279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 213398279 is about 14608.1579605370. The cubic root of 213398279 is about 597.5812616845.

The spelling of 213398279 in words is "two hundred thirteen million, three hundred ninety-eight thousand, two hundred seventy-nine".