348000189821 has 4 divisors (see below), whose sum is σ = 348001390044. Its totient is φ = 347998989600.

The previous prime is 348000189809. The next prime is 348000189829. The reversal of 348000189821 is 128981000843.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 205742980921 + 142257208900 = 453589^2 + 377170^2 .

It is a cyclic number.

It is not a de Polignac number, because 348000189821 - 2³⁰ = 346926447997 is a prime.

It is a super-2 number, since 2×348000189821² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (348000189829) 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, 134831 + ... + 845091.

It is an arithmetic number, because the mean of its divisors is an integer number (87000347511).

Almost surely, 2^348000189821 is an apocalyptic number.

It is an amenable number.

348000189821 is a deficient number, since it is larger than the sum of its proper divisors (1200223).

348000189821 is an equidigital number, since it uses as much as digits as its factorization.

348000189821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1200222.

The product of its (nonzero) digits is 110592, while the sum is 44.

The spelling of 348000189821 in words is "three hundred forty-eight billion, one hundred eighty-nine thousand, eight hundred twenty-one".