346221397 has 2 divisors, whose sum is σ = 346221398. Its totient is φ = 346221396.

The previous prime is 346221383. The next prime is 346221409. The reversal of 346221397 is 793122643.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326561041 + 19660356 = 18071^2 + 4434^2 .

It is a cyclic number.

It is not a de Polignac number, because 346221397 - 2¹⁹ = 345697109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (346228397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173110698 + 173110699.

It is an arithmetic number, because the mean of its divisors is an integer number (173110699).

Almost surely, 2^346221397 is an apocalyptic number.

It is an amenable number.

346221397 is a deficient number, since it is larger than the sum of its proper divisors (1).

346221397 is an equidigital number, since it uses as much as digits as its factorization.

346221397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 37.

The square root of 346221397 is about 18607.0254742664. The cubic root of 346221397 is about 702.1846016036.

The spelling of 346221397 in words is "three hundred forty-six million, two hundred twenty-one thousand, three hundred ninety-seven".