345919 has 4 divisors (see below), whose sum is σ = 395344. Its totient is φ = 296496.

The previous prime is 345907. The next prime is 345923. The reversal of 345919 is 919543.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 919543 = 19 ⋅48397.

It is a cyclic number.

It is not a de Polignac number, because 345919 - 2⁵ = 345887 is a prime.

It is a super-2 number, since 2×345919² = 239319909122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24702 + ... + 24715.

It is an arithmetic number, because the mean of its divisors is an integer number (98836).

2³⁴⁵⁹¹⁹ is an apocalyptic number.

345919 is a deficient number, since it is larger than the sum of its proper divisors (49425).

345919 is an equidigital number, since it uses as much as digits as its factorization.

345919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49424.

The product of its digits is 4860, while the sum is 31.

The square root of 345919 is about 588.1487906984. The cubic root of 345919 is about 70.1980107823.

The spelling of 345919 in words is "three hundred forty-five thousand, nine hundred nineteen".