34065821 has 2 divisors, whose sum is σ = 34065822. Its totient is φ = 34065820.

The previous prime is 34065817. The next prime is 34065839. The reversal of 34065821 is 12856043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24393721 + 9672100 = 4939^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 34065821 - 2² = 34065817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34065881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17032910 + 17032911.

It is an arithmetic number, because the mean of its divisors is an integer number (17032911).

Almost surely, 2^34065821 is an apocalyptic number.

It is an amenable number.

34065821 is a deficient number, since it is larger than the sum of its proper divisors (1).

34065821 is an equidigital number, since it uses as much as digits as its factorization.

34065821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 34065821 is about 5836.5932700506. The cubic root of 34065821 is about 324.1700987896.

The spelling of 34065821 in words is "thirty-four million, sixty-five thousand, eight hundred twenty-one".