346844821 has 2 divisors, whose sum is σ = 346844822. Its totient is φ = 346844820.

The previous prime is 346844801. The next prime is 346844851. The reversal of 346844821 is 128448643.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 277722225 + 69122596 = 16665^2 + 8314^2 .

It is a cyclic number.

It is not a de Polignac number, because 346844821 - 2¹³ = 346836629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346844801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173422410 + 173422411.

It is an arithmetic number, because the mean of its divisors is an integer number (173422411).

Almost surely, 2^346844821 is an apocalyptic number.

It is an amenable number.

346844821 is a deficient number, since it is larger than the sum of its proper divisors (1).

346844821 is an equidigital number, since it uses as much as digits as its factorization.

346844821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 40.

The square root of 346844821 is about 18623.7703218226. The cubic root of 346844821 is about 702.6058120864.

The spelling of 346844821 in words is "three hundred forty-six million, eight hundred forty-four thousand, eight hundred twenty-one".