34837821 has 6 divisors (see below), whose sum is σ = 50321310. Its totient is φ = 23225208.

The previous prime is 34837813. The next prime is 34837843. The reversal of 34837821 is 12873843.

34837821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 26936100 + 7901721 = 5190^2 + 2811^2 .

It is not a de Polignac number, because 34837821 - 2³ = 34837813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34837861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1935426 + ... + 1935443.

It is an arithmetic number, because the mean of its divisors is an integer number (8386885).

Almost surely, 2^34837821 is an apocalyptic number.

It is an amenable number.

34837821 is a deficient number, since it is larger than the sum of its proper divisors (15483489).

34837821 is a wasteful number, since it uses less digits than its factorization.

34837821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3870875 (or 3870872 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 34837821 is about 5902.3572409674. The cubic root of 34837821 is about 326.6006121937.

The spelling of 34837821 in words is "thirty-four million, eight hundred thirty-seven thousand, eight hundred twenty-one".