345547 has 2 divisors, whose sum is σ = 345548. Its totient is φ = 345546.

The previous prime is 345533. The next prime is 345551. The reversal of 345547 is 745543.

It is a strong prime.

It is an emirp because it is prime and its reverse (745543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345547 - 2¹⁵ = 312779 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172773 + 172774.

It is an arithmetic number, because the mean of its divisors is an integer number (172774).

2³⁴⁵⁵⁴⁷ is an apocalyptic number.

345547 is a deficient number, since it is larger than the sum of its proper divisors (1).

345547 is an equidigital number, since it uses as much as digits as its factorization.

345547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 28.

The square root of 345547 is about 587.8324591242. The cubic root of 345547 is about 70.1728381971.

The spelling of 345547 in words is "three hundred forty-five thousand, five hundred forty-seven".