349259681 has 2 divisors, whose sum is σ = 349259682. Its totient is φ = 349259680.

The previous prime is 349259657. The next prime is 349259693. The reversal of 349259681 is 186952943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 338891281 + 10368400 = 18409^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 349259681 - 2²² = 345065377 is a prime.

It is a super-2 number, since 2×349259681² = 243964649544443522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349259641) 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, 174629840 + 174629841.

It is an arithmetic number, because the mean of its divisors is an integer number (174629841).

Almost surely, 2^349259681 is an apocalyptic number.

It is an amenable number.

349259681 is a deficient number, since it is larger than the sum of its proper divisors (1).

349259681 is an equidigital number, since it uses as much as digits as its factorization.

349259681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 466560, while the sum is 47.

The square root of 349259681 is about 18688.4906025072. The cubic root of 349259681 is about 704.2326415891.

The spelling of 349259681 in words is "three hundred forty-nine million, two hundred fifty-nine thousand, six hundred eighty-one".