213142393 has 2 divisors, whose sum is σ = 213142394. Its totient is φ = 213142392.

The previous prime is 213142381. The next prime is 213142409. The reversal of 213142393 is 393241312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192321424 + 20820969 = 13868^2 + 4563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213142393 is a prime.

It is not a weakly prime, because it can be changed into another prime (213142093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106571196 + 106571197.

It is an arithmetic number, because the mean of its divisors is an integer number (106571197).

Almost surely, 2^213142393 is an apocalyptic number.

It is an amenable number.

213142393 is a deficient number, since it is larger than the sum of its proper divisors (1).

213142393 is an equidigital number, since it uses as much as digits as its factorization.

213142393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 28.

The square root of 213142393 is about 14599.3970080959. The cubic root of 213142393 is about 597.3423128054.

The spelling of 213142393 in words is "two hundred thirteen million, one hundred forty-two thousand, three hundred ninety-three".