345323261 has 4 divisors (see below), whose sum is σ = 365636412. Its totient is φ = 325010112.

The previous prime is 345323189. The next prime is 345323263. The reversal of 345323261 is 162323543.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129527161 + 215796100 = 11381^2 + 14690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345323261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345323263) 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 in 3 ways as a sum of consecutive naturals, for example, 10156550 + ... + 10156583.

It is an arithmetic number, because the mean of its divisors is an integer number (91409103).

Almost surely, 2^345323261 is an apocalyptic number.

It is an amenable number.

345323261 is a deficient number, since it is larger than the sum of its proper divisors (20313151).

345323261 is a wasteful number, since it uses less digits than its factorization.

345323261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20313150.

The product of its digits is 12960, while the sum is 29.

The square root of 345323261 is about 18582.8754771698. The cubic root of 345323261 is about 701.5768947111.

The spelling of 345323261 in words is "three hundred forty-five million, three hundred twenty-three thousand, two hundred sixty-one".