349180421 has 2 divisors, whose sum is σ = 349180422. Its totient is φ = 349180420.

The previous prime is 349180397. The next prime is 349180439. The reversal of 349180421 is 124081943.

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., 331749796 + 17430625 = 18214^2 + 4175^2 .

It is a cyclic number.

It is not a de Polignac number, because 349180421 - 2²⁶ = 282071557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349180441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174590210 + 174590211.

It is an arithmetic number, because the mean of its divisors is an integer number (174590211).

Almost surely, 2^349180421 is an apocalyptic number.

It is an amenable number.

349180421 is a deficient number, since it is larger than the sum of its proper divisors (1).

349180421 is an equidigital number, since it uses as much as digits as its factorization.

349180421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 349180421 is about 18686.3699256972. The cubic root of 349180421 is about 704.1793653737.

The spelling of 349180421 in words is "three hundred forty-nine million, one hundred eighty thousand, four hundred twenty-one".