345605069 has 2 divisors, whose sum is σ = 345605070. Its totient is φ = 345605068.

The previous prime is 345605063. The next prime is 345605089. The reversal of 345605069 is 960506543.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344584969 + 1020100 = 18563^2 + 1010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345605069 is a prime.

It is a super-2 number, since 2×345605069² = 238885727436989522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345605063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172802534 + 172802535.

It is an arithmetic number, because the mean of its divisors is an integer number (172802535).

Almost surely, 2^345605069 is an apocalyptic number.

It is an amenable number.

345605069 is a deficient number, since it is larger than the sum of its proper divisors (1).

345605069 is an equidigital number, since it uses as much as digits as its factorization.

345605069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

The square root of 345605069 is about 18590.4563956886. The cubic root of 345605069 is about 701.7676881372.

The spelling of 345605069 in words is "three hundred forty-five million, six hundred five thousand, sixty-nine".