345840669 has 6 divisors (see below), whose sum is σ = 499547646. Its totient is φ = 230560440.

The previous prime is 345840661. The next prime is 345840683. The reversal of 345840669 is 966048543.

345840669 is a `hidden beast` number, since 3 + 4 + 584 + 0 + 6 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 340845444 + 4995225 = 18462^2 + 2235^2 .

It is not a de Polignac number, because 345840669 - 2³ = 345840661 is a prime.

It is a super-2 number, since 2×345840669² = 239211536668735122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345840661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19213362 + ... + 19213379.

It is an arithmetic number, because the mean of its divisors is an integer number (83257941).

Almost surely, 2^345840669 is an apocalyptic number.

It is an amenable number.

345840669 is a deficient number, since it is larger than the sum of its proper divisors (153706977).

345840669 is a wasteful number, since it uses less digits than its factorization.

345840669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38426747 (or 38426744 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The square root of 345840669 is about 18596.7919007554. The cubic root of 345840669 is about 701.9271176192.

The spelling of 345840669 in words is "three hundred forty-five million, eight hundred forty thousand, six hundred sixty-nine".