345679447 has 4 divisors (see below), whose sum is σ = 345716640. Its totient is φ = 345642256.

The previous prime is 345679441. The next prime is 345679531. The reversal of 345679447 is 744976543.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 744976543 = 83 ⋅8975621.

It is a cyclic number.

It is not a de Polignac number, because 345679447 - 2¹¹ = 345677399 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 345679447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (345679441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8754 + ... + 27712.

It is an arithmetic number, because the mean of its divisors is an integer number (86429160).

Almost surely, 2^345679447 is an apocalyptic number.

345679447 is a deficient number, since it is larger than the sum of its proper divisors (37193).

345679447 is a wasteful number, since it uses less digits than its factorization.

345679447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37192.

The product of its digits is 2540160, while the sum is 49.

The square root of 345679447 is about 18592.4567230907. The cubic root of 345679447 is about 701.8180272263.

The spelling of 345679447 in words is "three hundred forty-five million, six hundred seventy-nine thousand, four hundred forty-seven".