345206969 has 2 divisors, whose sum is σ = 345206970. Its totient is φ = 345206968.

The previous prime is 345206957. The next prime is 345206971. The reversal of 345206969 is 969602543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 330766969 + 14440000 = 18187^2 + 3800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345206969 is a prime.

It is a super-2 number, since 2×345206969² = 238335702892333922, which contains 22 as substring.

Together with 345206971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (345206909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172603484 + 172603485.

It is an arithmetic number, because the mean of its divisors is an integer number (172603485).

Almost surely, 2^345206969 is an apocalyptic number.

It is an amenable number.

345206969 is a deficient number, since it is larger than the sum of its proper divisors (1).

345206969 is an equidigital number, since it uses as much as digits as its factorization.

345206969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 345206969 is about 18579.7462038640. The cubic root of 345206969 is about 701.4981308882.

The spelling of 345206969 in words is "three hundred forty-five million, two hundred six thousand, nine hundred sixty-nine".