349521121 has 2 divisors, whose sum is σ = 349521122. Its totient is φ = 349521120.

The previous prime is 349521101. The next prime is 349521149. The reversal of 349521121 is 121125943.

It is an a-pointer prime, because the next prime (349521149) can be obtained adding 349521121 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 229946896 + 119574225 = 15164^2 + 10935^2 .

It is a cyclic number.

It is not a de Polignac number, because 349521121 - 2⁵ = 349521089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 349521121.

It is not a weakly prime, because it can be changed into another prime (349521101) 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, 174760560 + 174760561.

It is an arithmetic number, because the mean of its divisors is an integer number (174760561).

Almost surely, 2^349521121 is an apocalyptic number.

It is an amenable number.

349521121 is a deficient number, since it is larger than the sum of its proper divisors (1).

349521121 is an equidigital number, since it uses as much as digits as its factorization.

349521121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 349521121 is about 18695.4839734092. The cubic root of 349521121 is about 704.4083166632.

The spelling of 349521121 in words is "three hundred forty-nine million, five hundred twenty-one thousand, one hundred twenty-one".