345989 has 12 divisors (see below), whose sum is σ = 421344. Its totient is φ = 282744.

The previous prime is 345979. The next prime is 345997. The reversal of 345989 is 989543.

It is not a de Polignac number, because 345989 - 2⁸ = 345733 is a prime.

It is a Curzon 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 11 ways as a sum of consecutive naturals, for example, 974 + ... + 1280.

It is an arithmetic number, because the mean of its divisors is an integer number (35112).

2³⁴⁵⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

345989 is a deficient number, since it is larger than the sum of its proper divisors (75355).

345989 is a wasteful number, since it uses less digits than its factorization.

345989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 337 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 345989 is about 588.2082964393. The cubic root of 345989 is about 70.2027455413.

The spelling of 345989 in words is "three hundred forty-five thousand, nine hundred eighty-nine".