213715867 has 2 divisors, whose sum is σ = 213715868. Its totient is φ = 213715866.

The previous prime is 213715849. The next prime is 213715871. The reversal of 213715867 is 768517312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213715867 is a prime.

It is not a weakly prime, because it can be changed into another prime (213715897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106857933 + 106857934.

It is an arithmetic number, because the mean of its divisors is an integer number (106857934).

Almost surely, 2^213715867 is an apocalyptic number.

213715867 is a deficient number, since it is larger than the sum of its proper divisors (1).

213715867 is an equidigital number, since it uses as much as digits as its factorization.

213715867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 40.

The square root of 213715867 is about 14619.0241466385. The cubic root of 213715867 is about 597.8775629917.

The spelling of 213715867 in words is "two hundred thirteen million, seven hundred fifteen thousand, eight hundred sixty-seven".