349718357 has 2 divisors, whose sum is σ = 349718358. Its totient is φ = 349718356.

The previous prime is 349718353. The next prime is 349718387. The reversal of 349718357 is 753817943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 261339556 + 88378801 = 16166^2 + 9401^2 .

It is a cyclic number.

It is not a de Polignac number, because 349718357 - 2² = 349718353 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349718353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174859178 + 174859179.

It is an arithmetic number, because the mean of its divisors is an integer number (174859179).

Almost surely, 2^349718357 is an apocalyptic number.

It is an amenable number.

349718357 is a deficient number, since it is larger than the sum of its proper divisors (1).

349718357 is an equidigital number, since it uses as much as digits as its factorization.

349718357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 47.

The square root of 349718357 is about 18700.7581931856. The cubic root of 349718357 is about 704.5407917792.

The spelling of 349718357 in words is "three hundred forty-nine million, seven hundred eighteen thousand, three hundred fifty-seven".