349540693 has 2 divisors, whose sum is σ = 349540694. Its totient is φ = 349540692.

The previous prime is 349540691. The next prime is 349540759. The reversal of 349540693 is 396045943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 271359729 + 78180964 = 16473^2 + 8842^2 .

It is an emirp because it is prime and its reverse (396045943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349540693 - 2¹ = 349540691 is a prime.

Together with 349540691, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349540691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174770346 + 174770347.

It is an arithmetic number, because the mean of its divisors is an integer number (174770347).

Almost surely, 2^349540693 is an apocalyptic number.

It is an amenable number.

349540693 is a deficient number, since it is larger than the sum of its proper divisors (1).

349540693 is an equidigital number, since it uses as much as digits as its factorization.

349540693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 349540693 is about 18696.0074080002. The cubic root of 349540693 is about 704.4214645784.

The spelling of 349540693 in words is "three hundred forty-nine million, five hundred forty thousand, six hundred ninety-three".