345617873 has 2 divisors, whose sum is σ = 345617874. Its totient is φ = 345617872.

The previous prime is 345617869. The next prime is 345617891. The reversal of 345617873 is 378716543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238764304 + 106853569 = 15452^2 + 10337^2 .

It is a cyclic number.

It is not a de Polignac number, because 345617873 - 2² = 345617869 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 (345617813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172808936 + 172808937.

It is an arithmetic number, because the mean of its divisors is an integer number (172808937).

Almost surely, 2^345617873 is an apocalyptic number.

It is an amenable number.

345617873 is a deficient number, since it is larger than the sum of its proper divisors (1).

345617873 is an equidigital number, since it uses as much as digits as its factorization.

345617873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The square root of 345617873 is about 18590.8007627428. The cubic root of 345617873 is about 701.7763544091.

The spelling of 345617873 in words is "three hundred forty-five million, six hundred seventeen thousand, eight hundred seventy-three".