34387321 has 4 divisors (see below), whose sum is σ = 36197200. Its totient is φ = 32577444.

The previous prime is 34387313. The next prime is 34387351. The reversal of 34387321 is 12378343.

34387321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12378343 = 47 ⋅263369.

It is a cyclic number.

It is not a de Polignac number, because 34387321 - 2³ = 34387313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (34387351) 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 3 ways as a sum of consecutive naturals, for example, 904911 + ... + 904948.

It is an arithmetic number, because the mean of its divisors is an integer number (9049300).

Almost surely, 2^34387321 is an apocalyptic number.

It is an amenable number.

34387321 is a deficient number, since it is larger than the sum of its proper divisors (1809879).

34387321 is a wasteful number, since it uses less digits than its factorization.

34387321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1809878.

The product of its digits is 12096, while the sum is 31.

The square root of 34387321 is about 5864.0703440528. The cubic root of 34387321 is about 325.1867045566.

The spelling of 34387321 in words is "thirty-four million, three hundred eighty-seven thousand, three hundred twenty-one".