345256823 has 2 divisors, whose sum is σ = 345256824. Its totient is φ = 345256822.

The previous prime is 345256817. The next prime is 345256831. The reversal of 345256823 is 328652543.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 345256823 - 2⁶ = 345256759 is a prime.

It is equal to p_18562385 and since 345256823 and 18562385 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345256423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172628411 + 172628412.

It is an arithmetic number, because the mean of its divisors is an integer number (172628412).

Almost surely, 2^345256823 is an apocalyptic number.

345256823 is a deficient number, since it is larger than the sum of its proper divisors (1).

345256823 is an equidigital number, since it uses as much as digits as its factorization.

345256823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 38.

The square root of 345256823 is about 18581.0877776302. The cubic root of 345256823 is about 701.5318988473.

The spelling of 345256823 in words is "three hundred forty-five million, two hundred fifty-six thousand, eight hundred twenty-three".