345320347 has 2 divisors, whose sum is σ = 345320348. Its totient is φ = 345320346.

The previous prime is 345320317. The next prime is 345320359. The reversal of 345320347 is 743023543.

It is a strong prime.

It is an emirp because it is prime and its reverse (743023543) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345320347 is a prime.

It is a super-2 number, since 2×345320347² = 238492284104400818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345320317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172660173 + 172660174.

It is an arithmetic number, because the mean of its divisors is an integer number (172660174).

Almost surely, 2^345320347 is an apocalyptic number.

345320347 is a deficient number, since it is larger than the sum of its proper divisors (1).

345320347 is an equidigital number, since it uses as much as digits as its factorization.

345320347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 31.

The square root of 345320347 is about 18582.7970714852. The cubic root of 345320347 is about 701.5749212937.

The spelling of 345320347 in words is "three hundred forty-five million, three hundred twenty thousand, three hundred forty-seven".