345977 has 4 divisors (see below), whose sum is σ = 349440. Its totient is φ = 342516.

The previous prime is 345953. The next prime is 345979. The reversal of 345977 is 779543.

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 345977 - 2¹⁸ = 83833 is a prime.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1577 + ... + 1782.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

2³⁴⁵⁹⁷⁷ is an apocalyptic number.

It is an amenable number.

345977 is a deficient number, since it is larger than the sum of its proper divisors (3463).

345977 is a wasteful number, since it uses less digits than its factorization.

345977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3462.

The product of its digits is 26460, while the sum is 35.

The square root of 345977 is about 588.1980958827. The cubic root of 345977 is about 70.2019339137.

The spelling of 345977 in words is "three hundred forty-five thousand, nine hundred seventy-seven".