349196921 has 2 divisors, whose sum is σ = 349196922. Its totient is φ = 349196920.

The previous prime is 349196909. The next prime is 349196923. The reversal of 349196921 is 129691943.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208513600 + 140683321 = 14440^2 + 11861^2 .

It is a cyclic number.

It is not a de Polignac number, because 349196921 - 2¹⁸ = 348934777 is a prime.

Together with 349196923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (349196923) 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, 174598460 + 174598461.

It is an arithmetic number, because the mean of its divisors is an integer number (174598461).

Almost surely, 2^349196921 is an apocalyptic number.

It is an amenable number.

349196921 is a deficient number, since it is larger than the sum of its proper divisors (1).

349196921 is an equidigital number, since it uses as much as digits as its factorization.

349196921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104976, while the sum is 44.

The square root of 349196921 is about 18686.8114187520. The cubic root of 349196921 is about 704.1904568475.

The spelling of 349196921 in words is "three hundred forty-nine million, one hundred ninety-six thousand, nine hundred twenty-one".