438198138239 has 2 divisors, whose sum is σ = 438198138240. Its totient is φ = 438198138238.

The previous prime is 438198138199. The next prime is 438198138247. The reversal of 438198138239 is 932831891834.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438198138239 is a prime.

It is a super-2 number, since 2×438198138239² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438198138289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219099069119 + 219099069120.

It is an arithmetic number, because the mean of its divisors is an integer number (219099069120).

Almost surely, 2^438198138239 is an apocalyptic number.

438198138239 is a deficient number, since it is larger than the sum of its proper divisors (1).

438198138239 is an equidigital number, since it uses as much as digits as its factorization.

438198138239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 59.

The spelling of 438198138239 in words is "four hundred thirty-eight billion, one hundred ninety-eight million, one hundred thirty-eight thousand, two hundred thirty-nine".