1017787272349 has 2 divisors, whose sum is σ = 1017787272350. Its totient is φ = 1017787272348.

The previous prime is 1017787272347. The next prime is 1017787272371. The reversal of 1017787272349 is 9432727877101.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 998364669124 + 19422603225 = 999182^2 + 139365^2 .

It is a cyclic number.

It is not a de Polignac number, because 1017787272349 - 2¹ = 1017787272347 is a prime.

Together with 1017787272347, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1017787272293 and 1017787272302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1017787272347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 508893636174 + 508893636175.

It is an arithmetic number, because the mean of its divisors is an integer number (508893636175).

Almost surely, 2^{1017787272349} is an apocalyptic number.

It is an amenable number.

1017787272349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1017787272349 is an equidigital number, since it uses as much as digits as its factorization.

1017787272349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8297856, while the sum is 58.

The spelling of 1017787272349 in words is "one trillion, seventeen billion, seven hundred eighty-seven million, two hundred seventy-two thousand, three hundred forty-nine".