34278821 has 4 divisors (see below), whose sum is σ = 34388652. Its totient is φ = 34168992.

The previous prime is 34278779. The next prime is 34278833. The reversal of 34278821 is 12887243.

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

It can be written as a sum of positive squares in 2 ways, for example, as 801025 + 33477796 = 895^2 + 5786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34278821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34278221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54446 + ... + 55071.

It is an arithmetic number, because the mean of its divisors is an integer number (8597163).

Almost surely, 2^34278821 is an apocalyptic number.

It is an amenable number.

34278821 is a deficient number, since it is larger than the sum of its proper divisors (109831).

34278821 is a wasteful number, since it uses less digits than its factorization.

34278821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109830.

The product of its digits is 21504, while the sum is 35.

The square root of 34278821 is about 5854.8117817740. The cubic root of 34278821 is about 324.8443309720.

The spelling of 34278821 in words is "thirty-four million, two hundred seventy-eight thousand, eight hundred twenty-one".