345647231 has 2 divisors, whose sum is σ = 345647232. Its totient is φ = 345647230.

The previous prime is 345647227. The next prime is 345647233. The reversal of 345647231 is 132746543.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 345647231 - 2² = 345647227 is a prime.

It is a super-2 number, since 2×345647231² = 238944016595934722, which contains 22 as substring.

Together with 345647233, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 345647191 and 345647200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345647233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172823615 + 172823616.

It is an arithmetic number, because the mean of its divisors is an integer number (172823616).

Almost surely, 2^345647231 is an apocalyptic number.

345647231 is a deficient number, since it is larger than the sum of its proper divisors (1).

345647231 is an equidigital number, since it uses as much as digits as its factorization.

345647231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 35.

The square root of 345647231 is about 18591.5903300390. The cubic root of 345647231 is about 701.7962242986.

The spelling of 345647231 in words is "three hundred forty-five million, six hundred forty-seven thousand, two hundred thirty-one".