347940121 has 2 divisors, whose sum is σ = 347940122. Its totient is φ = 347940120.

The previous prime is 347940091. The next prime is 347940143. The reversal of 347940121 is 121049743.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300536896 + 47403225 = 17336^2 + 6885^2 .

It is an emirp because it is prime and its reverse (121049743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 347940121 - 2¹⁵ = 347907353 is a prime.

It is not a weakly prime, because it can be changed into another prime (347940161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173970060 + 173970061.

It is an arithmetic number, because the mean of its divisors is an integer number (173970061).

Almost surely, 2^347940121 is an apocalyptic number.

It is an amenable number.

347940121 is a deficient number, since it is larger than the sum of its proper divisors (1).

347940121 is an equidigital number, since it uses as much as digits as its factorization.

347940121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 347940121 is about 18653.1531114715. The cubic root of 347940121 is about 703.3446203849.

Adding to 347940121 its reverse (121049743), we get a palindrome (468989864).

The spelling of 347940121 in words is "three hundred forty-seven million, nine hundred forty thousand, one hundred twenty-one".