345320723 has 4 divisors (see below), whose sum is σ = 376713528. Its totient is φ = 313927920.

The previous prime is 345320713. The next prime is 345320743. The reversal of 345320723 is 327023543.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 345320723 - 2⁸ = 345320467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (345320713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15696386 + ... + 15696407.

It is an arithmetic number, because the mean of its divisors is an integer number (94178382).

Almost surely, 2^345320723 is an apocalyptic number.

345320723 is a deficient number, since it is larger than the sum of its proper divisors (31392805).

345320723 is a wasteful number, since it uses less digits than its factorization.

345320723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31392804.

The product of its (nonzero) digits is 15120, while the sum is 29.

The square root of 345320723 is about 18582.8071883663. The cubic root of 345320723 is about 701.5751759288.

The spelling of 345320723 in words is "three hundred forty-five million, three hundred twenty thousand, seven hundred twenty-three".