238443836413 has 2 divisors, whose sum is σ = 238443836414. Its totient is φ = 238443836412.

The previous prime is 238443836401. The next prime is 238443836443. The reversal of 238443836413 is 314638344832.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 223126803769 + 15317032644 = 472363^2 + 123762^2 .

It is a cyclic number.

It is not a de Polignac number, because 238443836413 - 2¹³ = 238443828221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (238443836443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119221918206 + 119221918207.

It is an arithmetic number, because the mean of its divisors is an integer number (119221918207).

Almost surely, 2^238443836413 is an apocalyptic number.

It is an amenable number.

238443836413 is a deficient number, since it is larger than the sum of its proper divisors (1).

238443836413 is an equidigital number, since it uses as much as digits as its factorization.

238443836413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3981312, while the sum is 49.

The spelling of 238443836413 in words is "two hundred thirty-eight billion, four hundred forty-three million, eight hundred thirty-six thousand, four hundred thirteen".