345889 has 2 divisors, whose sum is σ = 345890. Its totient is φ = 345888.

The previous prime is 345887. The next prime is 345907. The reversal of 345889 is 988543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291600 + 54289 = 540^2 + 233^2 .

It is a cyclic number.

It is not a de Polignac number, because 345889 - 2¹ = 345887 is a prime.

Together with 345887, it forms a pair of twin primes.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (345881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172944 + 172945.

It is an arithmetic number, because the mean of its divisors is an integer number (172945).

2³⁴⁵⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

345889 is a deficient number, since it is larger than the sum of its proper divisors (1).

345889 is an equidigital number, since it uses as much as digits as its factorization.

345889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 345889 is about 588.1232863950. The cubic root of 345889 is about 70.1959814043.

The spelling of 345889 in words is "three hundred forty-five thousand, eight hundred eighty-nine".