213197279 has 2 divisors, whose sum is σ = 213197280. Its totient is φ = 213197278.

The previous prime is 213197269. The next prime is 213197297. The reversal of 213197279 is 972791312.

Together with next prime (213197297) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213197279 - 2⁴ = 213197263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213197249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106598639 + 106598640.

It is an arithmetic number, because the mean of its divisors is an integer number (106598640).

Almost surely, 2^213197279 is an apocalyptic number.

213197279 is a deficient number, since it is larger than the sum of its proper divisors (1).

213197279 is an equidigital number, since it uses as much as digits as its factorization.

213197279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 213197279 is about 14601.2766222683. The cubic root of 213197279 is about 597.3935819999.

The spelling of 213197279 in words is "two hundred thirteen million, one hundred ninety-seven thousand, two hundred seventy-nine".