345998273 has 2 divisors, whose sum is σ = 345998274. Its totient is φ = 345998272.

The previous prime is 345998239. The next prime is 345998287. The reversal of 345998273 is 372899543.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 286523329 + 59474944 = 16927^2 + 7712^2 .

It is an emirp because it is prime and its reverse (372899543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345998273 - 2⁸ = 345998017 is a prime.

It is not a weakly prime, because it can be changed into another prime (345998293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172999136 + 172999137.

It is an arithmetic number, because the mean of its divisors is an integer number (172999137).

Almost surely, 2^345998273 is an apocalyptic number.

It is an amenable number.

345998273 is a deficient number, since it is larger than the sum of its proper divisors (1).

345998273 is an equidigital number, since it uses as much as digits as its factorization.

345998273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 50.

The square root of 345998273 is about 18601.0288156328. The cubic root of 345998273 is about 702.0337271372.

The spelling of 345998273 in words is "three hundred forty-five million, nine hundred ninety-eight thousand, two hundred seventy-three".