1438244346247 has 2 divisors, whose sum is σ = 1438244346248. Its totient is φ = 1438244346246.

The previous prime is 1438244346221. The next prime is 1438244346293. The reversal of 1438244346247 is 7426434428341.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1438244346247 is a prime.

It is a super-2 number, since 2×1438244346247² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1438244346194 and 1438244346203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1438244346347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719122173123 + 719122173124.

It is an arithmetic number, because the mean of its divisors is an integer number (719122173124).

Almost surely, 2^{1438244346247} is an apocalyptic number.

1438244346247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1438244346247 is an equidigital number, since it uses as much as digits as its factorization.

1438244346247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12386304, while the sum is 52.

The spelling of 1438244346247 in words is "one trillion, four hundred thirty-eight billion, two hundred forty-four million, three hundred forty-six thousand, two hundred forty-seven".