349005421 has 2 divisors, whose sum is σ = 349005422. Its totient is φ = 349005420.

The previous prime is 349005413. The next prime is 349005491. The reversal of 349005421 is 124500943.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 299809225 + 49196196 = 17315^2 + 7014^2 .

It is a cyclic number.

It is not a de Polignac number, because 349005421 - 2³ = 349005413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 349005421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349005491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174502710 + 174502711.

It is an arithmetic number, because the mean of its divisors is an integer number (174502711).

Almost surely, 2^349005421 is an apocalyptic number.

It is an amenable number.

349005421 is a deficient number, since it is larger than the sum of its proper divisors (1).

349005421 is an equidigital number, since it uses as much as digits as its factorization.

349005421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 349005421 is about 18681.6867814445. The cubic root of 349005421 is about 704.0617070190.

The spelling of 349005421 in words is "three hundred forty-nine million, five thousand, four hundred twenty-one".