349428169 has 2 divisors, whose sum is σ = 349428170. Its totient is φ = 349428168.

The previous prime is 349428143. The next prime is 349428179. The reversal of 349428169 is 961824943.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 342694144 + 6734025 = 18512^2 + 2595^2 .

It is an emirp because it is prime and its reverse (961824943) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 349428169 - 2¹³ = 349419977 is a prime.

It is a super-2 number, since 2×349428169² = 244200090581385122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (349428119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174714084 + 174714085.

It is an arithmetic number, because the mean of its divisors is an integer number (174714085).

Almost surely, 2^349428169 is an apocalyptic number.

It is an amenable number.

349428169 is a deficient number, since it is larger than the sum of its proper divisors (1).

349428169 is an equidigital number, since it uses as much as digits as its factorization.

349428169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The square root of 349428169 is about 18692.9978601614. The cubic root of 349428169 is about 704.3458674405.

The spelling of 349428169 in words is "three hundred forty-nine million, four hundred twenty-eight thousand, one hundred sixty-nine".