345342247 has 2 divisors, whose sum is σ = 345342248. Its totient is φ = 345342246.

The previous prime is 345342227. The next prime is 345342251. The reversal of 345342247 is 742243543.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345342247 is a prime.

It is a super-2 number, since 2×345342247² = 238522535126018018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345342227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172671123 + 172671124.

It is an arithmetic number, because the mean of its divisors is an integer number (172671124).

Almost surely, 2^345342247 is an apocalyptic number.

345342247 is a deficient number, since it is larger than the sum of its proper divisors (1).

345342247 is an equidigital number, since it uses as much as digits as its factorization.

345342247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 34.

The square root of 345342247 is about 18583.3863168154. The cubic root of 345342247 is about 701.5897521275.

The spelling of 345342247 in words is "three hundred forty-five million, three hundred forty-two thousand, two hundred forty-seven".