345777 has 4 divisors (see below), whose sum is σ = 461040. Its totient is φ = 230516.

The previous prime is 345773. The next prime is 345791. The reversal of 345777 is 777543.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 345777 - 2² = 345773 is a prime.

It is a D-number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (345773) 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, 57627 + ... + 57632.

It is an arithmetic number, because the mean of its divisors is an integer number (115260).

2³⁴⁵⁷⁷⁷ is an apocalyptic number.

It is an amenable number.

345777 is a deficient number, since it is larger than the sum of its proper divisors (115263).

345777 is a wasteful number, since it uses less digits than its factorization.

345777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115262.

The product of its digits is 20580, while the sum is 33.

The square root of 345777 is about 588.0280605549. The cubic root of 345777 is about 70.1884040229.

Subtracting from 345777 its sum of digits (33), we obtain a square (345744 = 588²).

The spelling of 345777 in words is "three hundred forty-five thousand, seven hundred seventy-seven".