346864921 has 16 divisors (see below), whose sum is σ = 386684928. Its totient is φ = 308980800.

The previous prime is 346864897. The next prime is 346864927. The reversal of 346864921 is 129468643.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-346864921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (346864927) 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, 172695 + ... + 174691.

It is an arithmetic number, because the mean of its divisors is an integer number (24167808).

Almost surely, 2^346864921 is an apocalyptic number.

346864921 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

346864921 is a deficient number, since it is larger than the sum of its proper divisors (39820007).

346864921 is a wasteful number, since it uses less digits than its factorization.

346864921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472.

The product of its digits is 248832, while the sum is 43.

The square root of 346864921 is about 18624.3099469484. The cubic root of 346864921 is about 702.6193840578.

The spelling of 346864921 in words is "three hundred forty-six million, eight hundred sixty-four thousand, nine hundred twenty-one".