346121621 has 2 divisors, whose sum is σ = 346121622. Its totient is φ = 346121620.

The previous prime is 346121617. The next prime is 346121627. The reversal of 346121621 is 126121643.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 259371025 + 86750596 = 16105^2 + 9314^2 .

It is a cyclic number.

It is not a de Polignac number, because 346121621 - 2² = 346121617 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 (346121627) 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, 173060810 + 173060811.

It is an arithmetic number, because the mean of its divisors is an integer number (173060811).

Almost surely, 2^346121621 is an apocalyptic number.

It is an amenable number.

346121621 is a deficient number, since it is larger than the sum of its proper divisors (1).

346121621 is an equidigital number, since it uses as much as digits as its factorization.

346121621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1728, while the sum is 26.

The square root of 346121621 is about 18604.3441432371. The cubic root of 346121621 is about 702.1171419735.

The spelling of 346121621 in words is "three hundred forty-six million, one hundred twenty-one thousand, six hundred twenty-one".