346744721 has 2 divisors, whose sum is σ = 346744722. Its totient is φ = 346744720.

The previous prime is 346744669. The next prime is 346744781. The reversal of 346744721 is 127447643.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 297183121 + 49561600 = 17239^2 + 7040^2 .

It is a cyclic number.

It is not a de Polignac number, because 346744721 - 2¹⁰ = 346743697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (346744781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173372360 + 173372361.

It is an arithmetic number, because the mean of its divisors is an integer number (173372361).

Almost surely, 2^346744721 is an apocalyptic number.

It is an amenable number.

346744721 is a deficient number, since it is larger than the sum of its proper divisors (1).

346744721 is an equidigital number, since it uses as much as digits as its factorization.

346744721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 38.

The square root of 346744721 is about 18621.0827021417. The cubic root of 346744721 is about 702.5382145091.

The spelling of 346744721 in words is "three hundred forty-six million, seven hundred forty-four thousand, seven hundred twenty-one".