349712557 has 2 divisors, whose sum is σ = 349712558. Its totient is φ = 349712556.

The previous prime is 349712543. The next prime is 349712569. The reversal of 349712557 is 755217943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223622116 + 126090441 = 14954^2 + 11229^2 .

It is an emirp because it is prime and its reverse (755217943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349712557 - 2¹¹ = 349710509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349782557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174856278 + 174856279.

It is an arithmetic number, because the mean of its divisors is an integer number (174856279).

Almost surely, 2^349712557 is an apocalyptic number.

It is an amenable number.

349712557 is a deficient number, since it is larger than the sum of its proper divisors (1).

349712557 is an equidigital number, since it uses as much as digits as its factorization.

349712557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 43.

The square root of 349712557 is about 18700.6031186163. The cubic root of 349712557 is about 704.5368968743.

The spelling of 349712557 in words is "three hundred forty-nine million, seven hundred twelve thousand, five hundred fifty-seven".