128347283431 has 2 divisors, whose sum is σ = 128347283432. Its totient is φ = 128347283430.

The previous prime is 128347283413. The next prime is 128347283531. The reversal of 128347283431 is 134382743821.

Together with previous prime (128347283413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is an emirp because it is prime and its reverse (134382743821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128347283431 - 2⁵ = 128347283399 is a prime.

It is a super-2 number, since 2×128347283431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128347283411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64173641715 + 64173641716.

It is an arithmetic number, because the mean of its divisors is an integer number (64173641716).

Almost surely, 2^128347283431 is an apocalyptic number.

128347283431 is a deficient number, since it is larger than the sum of its proper divisors (1).

128347283431 is an equidigital number, since it uses as much as digits as its factorization.

128347283431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774144, while the sum is 46.

It can be divided in two parts, 128347 and 283431, that added together give a triangular number (411778 = T₉₀₇).

The spelling of 128347283431 in words is "one hundred twenty-eight billion, three hundred forty-seven million, two hundred eighty-three thousand, four hundred thirty-one".