349418621 has 2 divisors, whose sum is σ = 349418622. Its totient is φ = 349418620.

The previous prime is 349418579. The next prime is 349418627. The reversal of 349418621 is 126814943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 282408025 + 67010596 = 16805^2 + 8186^2 .

It is a cyclic number.

It is not a de Polignac number, because 349418621 - 2²⁶ = 282309757 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (349418627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174709310 + 174709311.

It is an arithmetic number, because the mean of its divisors is an integer number (174709311).

Almost surely, 2^349418621 is an apocalyptic number.

It is an amenable number.

349418621 is a deficient number, since it is larger than the sum of its proper divisors (1).

349418621 is an equidigital number, since it uses as much as digits as its factorization.

349418621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 349418621 is about 18692.7424686695. The cubic root of 349418621 is about 704.3394520489.

The spelling of 349418621 in words is "three hundred forty-nine million, four hundred eighteen thousand, six hundred twenty-one".