343821745 has 16 divisors (see below), whose sum is σ = 415920960. Its totient is φ = 272844864.

The previous prime is 343821743. The next prime is 343821761. The reversal of 343821745 is 547128343.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 343821745 - 2¹ = 343821743 is a prime.

Its product of digits (80640) is a multiple of the sum of its prime divisors (1344).

It is not an unprimeable number, because it can be changed into a prime (343821743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 534394 + ... + 535036.

It is an arithmetic number, because the mean of its divisors is an integer number (25995060).

Almost surely, 2^343821745 is an apocalyptic number.

It is an amenable number.

343821745 is a deficient number, since it is larger than the sum of its proper divisors (72099215).

343821745 is a wasteful number, since it uses less digits than its factorization.

343821745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344.

The product of its digits is 80640, while the sum is 37.

The square root of 343821745 is about 18542.4309355597. The cubic root of 343821745 is about 700.5585643796.

The spelling of 343821745 in words is "three hundred forty-three million, eight hundred twenty-one thousand, seven hundred forty-five".