345393985 has 4 divisors (see below), whose sum is σ = 414472788. Its totient is φ = 276315184.

The previous prime is 345393977. The next prime is 345393991. The reversal of 345393985 is 589393543.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589393543 = 157 ⋅3754099.

It can be written as a sum of positive squares in 2 ways, for example, as 183900721 + 161493264 = 13561^2 + 12708^2 .

It is a cyclic number.

It is not a de Polignac number, because 345393985 - 2³ = 345393977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34539394 + ... + 34539403.

It is an arithmetic number, because the mean of its divisors is an integer number (103618197).

Almost surely, 2^345393985 is an apocalyptic number.

It is an amenable number.

345393985 is a deficient number, since it is larger than the sum of its proper divisors (69078803).

345393985 is an equidigital number, since it uses as much as digits as its factorization.

345393985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69078802.

The product of its digits is 1749600, while the sum is 49.

The square root of 345393985 is about 18584.7783145240. The cubic root of 345393985 is about 701.6247869741.

The spelling of 345393985 in words is "three hundred forty-five million, three hundred ninety-three thousand, nine hundred eighty-five".