346878947 has 4 divisors (see below), whose sum is σ = 358840320. Its totient is φ = 334917576.

The previous prime is 346878943. The next prime is 346878977. The reversal of 346878947 is 749878643.

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

It is a cyclic number.

It is not a de Polignac number, because 346878947 - 2² = 346878943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 346878892 and 346878901.

It is not an unprimeable number, because it can be changed into a prime (346878943) 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, 5980643 + ... + 5980700.

It is an arithmetic number, because the mean of its divisors is an integer number (89710080).

Almost surely, 2^346878947 is an apocalyptic number.

346878947 is a deficient number, since it is larger than the sum of its proper divisors (11961373).

346878947 is a wasteful number, since it uses less digits than its factorization.

346878947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11961372.

The product of its digits is 8128512, while the sum is 56.

The square root of 346878947 is about 18624.6864940057. The cubic root of 346878947 is about 702.6288544175.

It can be divided in two parts, 34687 and 8947, that added together give a palindrome (43634).

The spelling of 346878947 in words is "three hundred forty-six million, eight hundred seventy-eight thousand, nine hundred forty-seven".