345212269 has 2 divisors, whose sum is σ = 345212270. Its totient is φ = 345212268.

The previous prime is 345212261. The next prime is 345212297. The reversal of 345212269 is 962212543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335988900 + 9223369 = 18330^2 + 3037^2 .

It is an emirp because it is prime and its reverse (962212543) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 345212269 - 2³ = 345212261 is a prime.

It is a super-2 number, since 2×345212269² = 238343021336256722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345212261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172606134 + 172606135.

It is an arithmetic number, because the mean of its divisors is an integer number (172606135).

Almost surely, 2^345212269 is an apocalyptic number.

It is an amenable number.

345212269 is a deficient number, since it is larger than the sum of its proper divisors (1).

345212269 is an equidigital number, since it uses as much as digits as its factorization.

345212269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 345212269 is about 18579.8888317449. Note that the first 4 decimals coincide. The cubic root of 345212269 is about 701.5017209288.

The spelling of 345212269 in words is "three hundred forty-five million, two hundred twelve thousand, two hundred sixty-nine".