345972569 has 2 divisors, whose sum is σ = 345972570. Its totient is φ = 345972568.

The previous prime is 345972547. The next prime is 345972587. The reversal of 345972569 is 965279543.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 340033600 + 5938969 = 18440^2 + 2437^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345972569 is a prime.

It is a super-2 number, since 2×345972569² = 239394037000919522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (345975569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172986284 + 172986285.

It is an arithmetic number, because the mean of its divisors is an integer number (172986285).

Almost surely, 2^345972569 is an apocalyptic number.

It is an amenable number.

345972569 is a deficient number, since it is larger than the sum of its proper divisors (1).

345972569 is an equidigital number, since it uses as much as digits as its factorization.

345972569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 50.

The square root of 345972569 is about 18600.3378732753. The cubic root of 345972569 is about 702.0163421547.

The spelling of 345972569 in words is "three hundred forty-five million, nine hundred seventy-two thousand, five hundred sixty-nine".