345974221 has 2 divisors, whose sum is σ = 345974222. Its totient is φ = 345974220.

The previous prime is 345974207. The next prime is 345974269. The reversal of 345974221 is 122479543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197402500 + 148571721 = 14050^2 + 12189^2 .

It is a cyclic number.

It is not a de Polignac number, because 345974221 - 2⁷ = 345974093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345974201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172987110 + 172987111.

It is an arithmetic number, because the mean of its divisors is an integer number (172987111).

Almost surely, 2^345974221 is an apocalyptic number.

It is an amenable number.

345974221 is a deficient number, since it is larger than the sum of its proper divisors (1).

345974221 is an equidigital number, since it uses as much as digits as its factorization.

345974221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 37.

The square root of 345974221 is about 18600.3822810178. The cubic root of 345974221 is about 702.0174595160.

The spelling of 345974221 in words is "three hundred forty-five million, nine hundred seventy-four thousand, two hundred twenty-one".